The war is over. The debt is not. And the creditor at the bottom of the world has kept every line of the account.
The crime is in daylight at last: the drowning was a bargain, the orders were its cover-up, and the drowned were never lost - they were kept, three hundred thousand souls held below by an ancient covenant the old world signed and then refused to pay. Now the deep has stopped singing. The silence under the world is a creditor's stopped pen.
Sereth and Rook built the peace. Now they must finish it - at a table forty fathoms down, across from the Mother Below herself, negotiating the only settlement that can free the song, the kept, and the living alike. Against them: the last of the founding bloodlines, a patient old man who would rather drown the reckoning than pay it. Beneath them: a ten-year-old boy who has been waiting at the door of the world for twenty-three years to be asked what he is owed.
And written into the covenant's deepest law, the price no one saw coming: whoever signs, keeps. Whoever keeps, stays.
The bond that began as a kill-song's accident is the one precedent in two worlds for what comes next - a human and a drowned soul, bound as equals, neither leashed. To close the account of the age, Sereth will have to sing the Requiem one last time. Over his heart. With his consent. As a wedding.
Enemies-to-lovers, concluded. Fated mates, fulfilled. The monster gets her happy ending - on the page, in the daylight, no apologies.
Adult dark romantasy. Open-door, slow burn. The trilogy's finale: full HEA, every promise paid, every name said. Bring tissues. Leave the wax at home - you'll want to hear this one.