She looked at the smiling, eager face of the little girl in the photograph, with dark hair, bright-green eyes, a missing front tooth, and her entire life ahead of her. Chelsea was last seen walking back from a friend's house one summer afternoon. She never made it home. An eight-year-old girl, Chelsea Compton, is missing in Pine Valley, California and for Detective Katie Scott it's a cruel reminder of the friend who disappeared from summer camp twenty years ago. Unable to shake the memories, Katie vows she won't rest until she discovers what happened to Chelsea. But as Katie starts to investigate - her PTSD flashbacks kept at bay with the help of her loyal ex-military dog, Cisco - the case reveals itself to be much bigger and more shocking than she feared. Deep in the forest, she unearths a makeshift cemetery: a row of graves, each with a brightly coloured teddy bear. Tracing the silk lining the coffins, Katie links the graves to a stack of missing-persons cases involving young girls - finding a pattern no one else has managed to see. Someone in Pine Valley has been taking the town's daughters for years, and Katie is the only one who can stop them.