Every year Mark and Jenna Whaley take a trip to Colorado to celebrate their wedding anniversary. This year they have more cause than ever to celebrate - they've finally been granted overnight access with Laurie, Mark's 11-year-old daughter from his previous marriage.
But their relaxing family break is shattered when they return from dinner in the hotel to find both Laurie and her 16-year-old babysitter, Shelby, missing.
Special Agent Ren Bryce will need to be at the top of her game to unravel the bizarre circumstances around this particular kidnapping. For it soon emerges both Mark and Jenna have something to hide. And that's before Mark's bitter ex-wife, Cathy, enters the equation.
But Ren has her own battles to fight. Her psychologist was killed four months previously and even though Ren knows she's headed for a manic episode, she's not sure she wants to stop it.
The lives of two young girls are in Ren's hands. But she might need to save herself before she can save them.