A cold-blooded murder. A confession. And a mystery that's just beginning in a shocking novel of psychological suspense by the Amazon Charts and Washington Post bestselling author of A Familiar Sight. Criminologist Dr. Gretchen White thought Detective Lauren Marconi could never cross certain lines. Then Lauren, with fresh blood on her hands, is arrested for an execution-style slaying. Even as the evidence mounts, Gretchen is convinced she's innocent. Because Lauren would have known how to get away with murder. Forced to team up with Lachlan Gibbs, the combative by-the-book star of Internal Affairs and Lauren's boyfriend, Gretchen starts digging for the truth. But when she begins to uncover Lauren's closely guarded secrets, the investigation raises more questions than answers. As Lauren's decade-long obsession with the victim comes to light, Gretchen can't help but doubt her own instincts. She knows better than most that not everything is as it seems. And with Lauren's future on the line, it's more important than ever to see this mystery through to the end.