As the story begins, a lonely woman vanishes while out on her morning run. Then a 22-year-old girl never returns from a walk. An old man disappears too. When fresh-faced policewoman Freya Graffham is assigned to the case, she runs the risk of getting too invested—too involved—in the action. Alongside the enigmatic detective Chief Inspector Simon Serrailler, she must unravel the mystery before events turn too gruesome.