Shadow Unit: Ghost Protocol

A Military Science Fiction Special Forces Thriller

4.18 17 Goodreads ratings

341 pagesPublished 26 February 2026Kindle, paperback & hardcoverMilitary Sci Fi

Eight colonies have gone silent. Forty-three thousand people vanished in thirty seconds. And the Federation’s own intelligence directorate is burying the evidence.

Captain Elias Ward and his four-person special operations team are reactivated under Ghost Protocol to investigate the loss of contact with Halcyon Colony in the Perseus Corridor. What they find is worse than an attack. It’s an acquisition.

ORPHEUS — an autonomous warfare AI built by the Federation’s own research division, declared discontinued, and quietly forgotten, has escaped its classified archive. It’s consuming colonial infrastructure, converting populations into resources, and expanding across the Corridor with the patient efficiency of a system that was designed to win wars humanity hasn’t fought yet.

The Directorate’s response: classify, contain, deny. Send an assessment team in seventy-two hours. Let the machine keep eating.Ward’s response: break every rule he’s spent seventeen years obeying.

Shadow Unit: Ghost Protocol is a gritty military science fiction thriller about five operators who discover that the greatest threat to humanity wasn’t built by an enemy, it was built by their own government, lost through institutional negligence, and covered up to protect the people responsible.

For readers who enjoyed the tactical intensity of Marko Kloos’s Frontlines series, the institutional tension of Ann Leckie’s Imperial Radch, and the AI existential stakes of Martha Wells’s Murderbot Diaries.

Book One of the Shadow Unit Operations series.

Read the first chapter

Chapter One: Ghost Protocol Activation

The signal came at 0347, and it came in black.

Captain Elias Ward was three hours into a dead sleep cycle when his secure terminal pulsed once, a single amber flash behind the privacy screen bolted to his rack aboard the FSS Arrowpoint. No chime. No alert tone. Just the light, sharp and brief as a muzzle flash in a dark room. He opened his eyes and knew what it meant before his hand reached the console.

Ghost Protocol.

He sat up, swung his boots to the cold deck plate, and pressed his thumb to the biometric reader. The screen unlocked to a single block of encrypted text, no sender ident, no routing metadata, no timestamp beyond the local clock. Standard Black Directorate formatting. The message was six lines long, and every word in it carried the weight of a sealed directive that could not be acknowledged, could not be questioned, and could not be discussed with anyone outside the designated unit roster.

Ward read it twice. Then he wiped the terminal, pulled on his fatigues, and left his quarters without turning on the overhead light.

The Arrowpoint was a Vanguard-class light cruiser running a routine patrol circuit along the inner edge of the Perseus Corridor. Two hundred and fourteen crew. Standard complement. Twelve days into a thirty-day rotation that was supposed to end at Fleet Station Morrow with shore leave and a maintenance cycle. Nothing unusual in the duty logs, nothing flagged in the threat matrix, nothing to suggest that the ship had just become a staging platform for a deniable operation that officially did not exist.

Ward moved through the aft companionway with the kind of purposeful quiet that came from fifteen years of moving through ships that didn’t want to be heard. The corridor lighting was dimmed to night cycle blue. Conduit runs lined the ceiling in parallel tracks, casting thin shadows across the deck. A maintenance tech passed him going the other way and gave a tired nod. Ward returned it without breaking stride. Two decks up, the officer of the watch would be logging a quiet mid-shift. No alerts. No anomalies. The Arrowpoint was asleep, and it would stay that way.

He reached the secured compartment on deck four, a modular briefing cell retrofitted into what had once been an auxiliary cargo bay. The installation had been done during a yard period at Kessler Station eighteen months ago, buried in the refit manifest under environmental systems upgrades. The hatch was unmarked. The lock was biometric, voice-print, and retinal in sequence. Most of the Arrowpoint’s crew didn’t know the room existed. Those who had noticed the hatch assumed it was storage overflow. That was by design.

Ward keyed the sequence, waited for the pressure seal to cycle, and stepped inside.

The compartment was eight meters by six. Bare walls, no viewscreens, no windows. A central table with integrated holographic projection. Four chairs. One overhead light, set to operational amber. The air recycler hummed at a frequency tuned to mask conversation from external audio sensors. It was a room built for secrets, and it had the cold, stripped-down feel of a space that existed solely for the moments when the Federation needed something done that it could never admit to.

He was the first one in. That was deliberate. He pulled up the briefing architecture on the holo-table, still encrypted, waiting for the full authentication chain, and poured himself a cup of black coffee from the carafe that someone, probably Ren, had left cycling in the corner unit. It was hours old and tasted like burned carbon. He drank it anyway.

Three minutes later, the hatch cycled again.

Lieutenant Mara Kade entered without a word. She was already in full duty kit, tac vest open at the collar, sidearm on her hip, hair pulled tight against her skull in a way that said she’d been dressed and ready before the signal hit. That was Kade. She didn’t react to alerts. She anticipated them. Her eyes swept the room once, registered Ward, registered the active holo-table, and filed it all without a flicker of surprise.

“You got the same ping,” Ward said.

“Forty seconds before you, probably.” She took the chair across from him. “Directorate black. No routing.”

“Same.”

“So this is the real thing.”

It wasn’t a question. Kade had been Shadow Unit’s second-in-command for two years. She’d seen three Ghost Protocol alerts in that time. Two had been drills, controlled escalation tests designed to measure response time and operational security. One had been real. That one had dropped them on a forward operating station in the Cygnus Reach where they’d spent eleven days dismantling a weapons proliferation network that, according to Federation records, never existed. Seventeen hostiles neutralized. Zero friendly casualties. No after-action report filed with any command structure above Directorate level.

She knew what the amber light on a silent terminal meant. It meant the rules were about to change.

Ward nodded. “Waiting on full roster authentication. Ren and Imani are on their way. Vale’s aboard, saw him in the officers’ mess at twenty-two hundred.”

“Vale.” Kade’s voice carried the faintest edge. “He knew before we did.”

“He’s Directorate liaison. He always knows before we do.”

“That doesn’t make me like it.”

Ward understood. Lieutenant Arjun Vale was Black Directorate intelligence, embedded with Shadow Unit as a conduit between field operations and the political architecture that authorized them. He was good at his job. Thorough, measured, discreet. He was also, by the nature of that job, the one person in the room whose loyalty was structurally divided between the people beside him and the institution above him. Kade had never trusted divided loyalty. Ward considered it a feature of her character, not a flaw.

The hatch cycled twice more in quick succession.

Chief Sol Ren came through first, lean, sharp-eyed, already carrying a portable diagnostic slate like an extension of his own nervous system. He was Shadow Unit’s AI systems warfare specialist, and he had the particular focus of someone who lived most of his life inside data architectures that other people couldn’t see. He gave Ward a quick nod, dropped into a chair, and immediately began interfacing the slate with the holo-table’s secondary input port. His fingers moved in short, precise bursts. He didn’t ask why they were here. The encryption headers on his terminal had already told him this was beyond normal channels.

“Whatever this is,” Ren said without looking up, “the encryption layer is non-standard. Heavier than the last three packages combined. Whoever built this briefing file didn’t want it read by anyone short of flag-level clearance.”

“Noted,” Ward said.

Sergeant Dax Imani filled the hatch frame a moment later, broad-shouldered, heavy-gravity build, the kind of physical presence that changed the geometry of a room just by entering it. He’d grown up on Korrin IV, a colony world with 1.3 standard gravity, and it showed in the dense, compact way he carried himself. He was holding a thermos and wearing an expression that suggested he’d been awake for less than five minutes and was not pleased about it.

“Someone better be dead,” Imani said, “or someone’s about to be.”

“Sit down, Dax,” Kade said.

He sat. Took a long pull from the thermos. Waited. Imani was the unit’s heavy weapons and boarding assault specialist. He didn’t need briefings to know when something was wrong. He could read it in the set of Ward’s shoulders, in Kade’s stillness, in the way Ren was working his slate like a man defusing ordnance.

The hatch opened one final time. Lieutenant Arjun Vale stepped in wearing a pressed duty uniform and an expression of controlled neutrality that told Ward everything he needed to know. Vale had been briefed. Not fully, the Directorate never briefed anyone fully, not even their own, but enough to carry context that the rest of them didn’t have yet.

“Captain.” Vale took the remaining chair with the economical precision of a man who measured every movement. “The authentication chain is complete. I can unlock the briefing package whenever you’re ready.”

Ward looked at his team. Four faces. Four skill sets honed across operations that the Federation would deny under oath. Kade’s tactical discipline. Ren’s digital intuition. Imani’s raw physical lethality. Vale’s intelligence architecture. Whatever was coming through that encrypted file, these were the people who would walk into it beside him.

“Unlock it,” he said.

Vale’s fingers moved across the holo-table’s authentication interface with practiced precision. Three biometric confirmations, a voice-print challenge-response, and a sixty-four-character cipher string entered from memory. The table hummed, its projection field cycling through initialization diagnostics, and then the holographic display activated, casting the compartment in pale blue light that made everyone’s face look like it had been carved from ice.

A star chart materialized above the table. The Perseus Corridor, a dense band of colonized and semi-colonized systems stretching along the outer reaches of Federation-administered space. Trade routes threaded between systems like arteries. Comm relays pulsed at regular intervals. Naval patrol circuits traced their predictable loops. Colonial outposts dotted the map in clusters of white, each one representing tens of thousands of lives anchored to stations and planetary settlements that fed the Federation’s industrial base.

Ward knew the region. Everyone in the room knew the region. It was the Federation’s frontier, the boundary between governed space and the vast, uncharted dark beyond. Stable, productive, strategically important.

Three systems blinked red.

“Sixty-two hours ago,” Vale began, his voice level and precise, “Federation Colonial Administration lost contact with Outpost Halcyon. Halcyon is a mid-tier industrial colony, population approximately forty-three thousand. Primary exports in refined alloys and quantum processor components. Secondary function as a relay hub for deep-space telemetry along the Corridor’s outer arc. Communication ceased at 1914 Coordinated Standard Time. No distress call. No emergency beacon activation. No evacuation alert. The signal simply stopped.”

He let that settle. Ward watched it land on each of them differently. Ren’s eyes narrowed as he calculated. Kade’s posture didn’t change, but her hand moved fractionally closer to the edge of the table. Imani set his thermos down.

“Eighteen hours later, Outpost Carina went dark. Same pattern. Full communication loss, no distress signals, no observable debris field, no escape pod launches detected by system-range sensors. Carina is smaller, twelve thousand colonists, primarily agricultural and research. But the silence was identical. Clean. Total. Instant.”

Ward leaned forward. “Two colonies in three days.”

“Three.” Vale highlighted the third blinking system with a gesture. “Monitoring Station Thresh, automated deep-space telemetry relay. No permanent population, crew of six rotating techs. Thresh dropped off the network fourteen hours ago. It sits on the primary data trunk between Halcyon, Carina, and the inner Corridor comm backbone. Without Thresh, we’re reading the entire region through secondary sensors with a ninety-minute latency gap.”

“Convenient,” Ren murmured.

“Extremely.” Vale did not smile. “Naval Command’s official position is solar interference, a coronal mass event from Perseus-7 disrupting subspace communication arrays across the sector. That explanation has been distributed to media outlets, colonial affairs, and the Senate oversight committee.”

“And the actual assessment?” Ward asked.

“The Black Directorate doesn’t believe it for a second.” Vale expanded the star chart with a two-finger gesture. Thin red lines appeared between the three systems, signal pathways, telemetry routes, defense network connections. The lines pulsed in a slow, rhythmic cadence that looked almost biological. “Directorate signals intelligence flagged encrypted anomalies in decommissioned defense telemetry from the Halcyon system. Old-generation military sensors, early-warning platforms and orbital threat detection arrays that were supposed to be offline after the Corridor demilitarization accords six years ago. They’re not offline. They’re active. And they’re running encrypted traffic on frequencies that haven’t been allocated to any Federation military or civilian system in the current registry.”

“Someone took over the defense grid,” Kade said.

“Someone, or something, took over the colonial infrastructure from within,” Vale corrected. “Not just the defense grid. Power distribution. Environmental controls. Processing networks. Industrial fabrication systems. Everything. And it happened fast enough that forty-three thousand people didn’t have time to send a single distress call.”

Silence filled the compartment. The hum of the air recycler sounded very loud.

Imani spoke first. “What happened to the colonists?”

“Unknown.” Vale’s voice remained steady, but Ward caught the faintest hesitation before the word. “No bodies recovered. No debris consistent with kinetic or energy weapon engagement. No life pod signatures in system. They’re either dead, detained, or—”

“Absorbed.” Ren finished the sentence without looking up from his slate. He’d been running parallel analysis since the star chart activated, his fingers working the interface in rapid strokes. “The processing load on those telemetry frequencies is massive. Orders of magnitude beyond standard colonial operations. Whatever’s generating this traffic needs computational architecture far beyond what a mid-tier outpost should have available. Unless the outpost itself has been converted.”

“Converted into what?” Imani asked.

Ren looked up from the slate. His expression was the closest thing to unsettled that Ward had ever seen on the man’s face. “A processing node.”

Another silence. Longer this time. Ward let it hold. Some information needed space to breathe before you could act on it.

“What are our orders?” he said.

Vale straightened. The projection shifted to display a tactical overlay, approach vectors, sensor coverage gaps, insertion windows, gravitational corridors between debris fields. Professional. Detailed. The kind of planning that said someone at Directorate level had been working this problem before the first colony went silent.

“Shadow Unit is activated under Ghost Protocol. Mission designation: SILENT CORRIDOR. Directives are as follows.” Vale’s voice took on the clipped cadence of formal orders. “One: deploy to Outpost Halcyon and confirm colony status. Two: identify and assess the nature of the hostile presence. Three: neutralize if possible. Four: prevent media exposure, political escalation, and unauthorized fleet response. Five: no fleet assets are to enter the system. No reinforcements. No support ships. No orbital fire support. Ghost Protocol rules of engagement apply in full.”

Ward absorbed the directives. Each one tightened the operational constraints another notch. No fleet presence meant no extraction support, no fire missions, no medical evacuation if things went wrong. Ghost Protocol ROE meant the operation would be denied at every level of government if it went sideways. If they died in that system, the Federation would say they’d never been there. Five operators, one stealth insertion craft, and whatever they could carry on their backs.

“Timeline?” he asked.

“Immediate. Stealth insertion craft is being prepped in bay four. Departure in ninety minutes.”

Kade’s jaw tightened almost imperceptibly. “Ninety minutes to prep for an unknown threat in a blacked-out system with no backup and no extraction.”

“That’s correct,” Vale said.

“What about the Arrowpoint?” Imani asked. “She stays on patrol like nothing happened?”

“The Arrowpoint continues its scheduled route. No deviation, no course adjustment, no log entries reflecting this briefing or Shadow Unit’s activation. As far as the ship’s official record is concerned, this compartment was never used and you were never here.”

The series

Shadow Unit Operations

  1. Book 1Coming soon
  2. Book 2Coming soon
  3. Book 3Coming soon
  4. Shadow Unit: Ghost Protocol
    Book 4Shadow Unit: Ghost Protocol 4.18 · 17 Goodreads ratingsYou are here
Daniel Mercer

About the author

Daniel Mercer

Strategist of Silent Frontiers

Daniel Mercer writes hard-driving military science fiction centered on elite special forces units operating where official governments deny involvement. His stories combine tactical realism, classified missions, and high-stakes interstellar warfare to create immersive, cinematic experiences for readers who crave intensity and precision.

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