She came to catalog books. She stayed because the house wouldn't let her leave.Iris Blackwood is done with dangerous men and done with losing herself. So when a lucrative contract sends her to Moonfall Manor, a crumbling Gothic estate with the most valuable occult library in existence, she plans to do the job and disappear. But the moment she crosses the threshold, the doors seal behind her. The windows frost over. And she discovers she's locked in with a vampire who's been waiting three hundred years for someone exactly like her.Cassius Vael is cursed. Bound to the manor by ancient magic, he's watched every relationship turn to obsession, every love become a cage. He knows what Iris's bloodline means. He knows what wanting her could cost them both. And he knows the house is listening to every word they speak, because in Moonfall Manor, promises become chains.A rival faction circles outside, hungry for the power locked in Iris's veins. The manor tests them with their deepest fears and darkest desires. And somewhere in the space between resistance and surrender, Iris and Cassius discover that the only way out is through each other, if they can learn to trust before the curse claims them both.Some oaths are made with blood. Some are made with the truth you're afraid to speak.