When the mysterious Count Ivar, a creature of the night, proposes to Rosamund, a peasant girl, she is ripped from her ordinary existence and thrust into a nightmare. She discovers that she is not just a prisoner but also a crucial component in Ivar's centuries-old mission—not to subjugate, but to protect the defenseless from invisible dangers—trapped inside the imposing walls of Castle Dravenstone. Rosamund must choose whether to stay a pawn in his age-old struggle for safety or to stand by him as fear gives way to an unforeseen bond.