Portland detective Archie Sheridan gets a message from serial killer Gretchen Lowell, who claims to have inside knowledge about the grisly murder of a man who was found gagged, skinned, and hanging by his wrists from a tree. Archie agrees to visit Gretchen because he can’t risk losing his only lead in the case. But the ties between Archie and Gretchen have always been stronger, deeper and more complex than he’s willing to admit.