After Keelynn witnesses her sister's murder at the hands of the legendary Gancanagh, an immortal creature who seduces women and kills them with a cursed kiss, she realizes there’s nothing she wouldn't do to get her back. With the help of a vengeful witch, she’s given everything she needs to resurrect the person she loves most. Tadhg, a devilishly handsome half-fae who has no patience for high society—or propriety—would rather spend his time in the company of loose women and dark creatures than help a human kill one of his own. Until Keelynn makes him an offer he can’t refuse.

Aveen is the perfect lady, placid and well-mannered, concealing her discontentment beneath false smiles and gentle nods. As the eldest, her duty has always been to her family legacy and her sister's happiness. But when she finds herself forced into betrothal to a man she loathes, she swears she'll do anything to escape. Even if it means bargaining with a wicked fae prince.

A malignant blight ravages Tearmann, wreaking havoc on the lives of the Danú. If Tadhg and Keelynn cannot find a way to stop it before it reaches the castle, there won’t be anything left for them to save. While the blight rages on, Aveen and Rían face troubles of their own. Between confronting ghosts from the past and fending off the Phantom Queen’s thirst for vengeance, peace and happiness seem too far out of reach. It isn’t a matter of if the Princes of Tearmann will fall, but when.