In ten years of working for the Damask Circle, shapeshifter Katherine Tanner has never come across anything like this child-murdering monster. Although she doesn't want to confront it, the Circle gives her little choice. The last thing she needs is interference from a cop who doesn't know what he's up against.

Ethan Morgan's niece is missing and he's determined to bring her back alive and catch the monster behind these kidnappings. He will use anyone to achieve his aims - even a woman who claims to be a witch.

Forced to join forces, Ethan and Kat struggle to uncover clues that will lead them to the monster's lair. Yet time is ticking away and the monster rarely keeps victims alive for more than seven days. Four of those days have already passed. But it soon becomes clear that the greatest threat to Kat might not come from the forces of darkness, but from the man she is beginning to love.