Shelby McDougall's past is behind her. Almost.

It's been five and a half years since Shelby put her infant twins up for adoption, and she's finally on track. Back in Santa Cruz, California, she's sharing an apartment with her brother, Dexter, and in her second year of criminal justice studies. She's landed her dream job as an intern to local P.I. Kathleen Bennett. And her stone-cold love life is heating up.

Then a late-night phone call puts Shelby's perfectly ordered life into a tailspin.

One of the twins has been kidnapped, snatched from home in the middle of the night. There are no witnesses — no clues, no trails to follow. After meeting the family, Shelby knows something is off. The adoptive parents tell her the children don't sleep, they eat constantly, and their IQs are off the charts. Against her better judgment, Shelby agrees to help.

By the time she realizes she's up against something powerful, something evil, it's almost too late. As Shelby fights for her life, and that of the kidnapped child, she discovers shocking truths about herself and the children.