It's a profile, like all the others on the online dating site. But as NYPD Detective Kat Donovan focuses on the accompanying picture, she feels her whole world explode, as emotions she's ignored for decades come crashing down on her. Staring back at her is her ex-fiance, Jeff, the man who shattered her heart-and who she hasn't seen in 18 years. Kat feels a spark, wondering if this might be the moment when past tragedies recede and a new world opens up to her. But when she reaches out to the man in the profile, her reawakened hope quickly darkens into suspicion and then terror as an unspeakable conspiracy comes to light, in which monsters prey upon the most vulnerable.