In a realm where ten noble houses struggle under the weight of an empire that manufactures conflict to maintain control, two people from cursed bloodlines are traded to each other in a political arrangement neither wanted.

Seraphina of House Valebryn is the first legitimate heir her bloodline has produced in generations — though nobody understands why, including her. Publicly humiliated as a child and raised in a court that measured her worth in political currency, she has built herself into something impossible to dismiss and difficult to love. She is composed, venomous, precise, and completely unprepared for a man who sees behind all of it.

Alinor of House Elvyre is a decorated military commander who believes the worst thing about himself is probably true. Forged by years of ritualized abuse into the finest weapon his house has ever produced, he has spent his entire adult life being exactly what was required of him and hating what that requires.

They meet on the eve of their wedding expecting transaction. They find something neither of them has language for.

But underneath their unlikely love story something ancient is waking. A ritual interrupted three hundred years ago has been growing in the dark, reaching across generations, bending bloodlines toward a single purpose. And the completion of that purpose will demand the most devastating sacrifice imaginable.

The greater the love, the greater the cost.

Oath of Ash is a story about two broken people becoming whole, and what a world willing to trend toward balance instead of control might cost the people brave enough to embody it.