A debt older than the Night Court has come due.

Detective Alina Moretti has spent the last year earning her place between two worlds: mortal law above the city, and supernatural governance beneath it. As the Night Court’s independent arbiter, she has forced hidden powers into the light, exposed corruption, and fought for transparency in a system built to resist it.

Then a financier is found dead in his penthouse with no wound, no blood, and no possible explanation.

The only clue is a faint copper residue on his skin, a mark Alina’s sigil recognizes before any forensic system can name it. When a vampire retainer is killed by the same impossible method, Alina discovers the truth the Night Court has avoided for centuries: beneath its laws sits something older, colder, and far less accountable.

The Hematic Concord governs the blood economy, an ancient system of inherited debts, self-executing contracts, and collectors who do not need permission to take what is owed.

But these collections are not random. Someone is choosing the victims. Someone is using old debts to attack the reforms Alina fought to build. And if she cannot prove the pattern before the next debt is called, the Night Court may decide transparency was the mistake all along.

To stop the killings, Alina must investigate a legal system that does not recognize her authority, a collector who may be acting within the law, and a conspiracy designed to turn accountability itself into a weapon.

The Debtor’s Coin is Book Three of The Night Court Files, a female-led urban fantasy mystery series featuring sharp heroines, secret courts, supernatural law, vampire politics, and high-stakes magical conspiracy.