Twelve-year-old Steven Lamb digs in the earth around the village of Exmoor every day after school, hoping to find the body of his uncle, who disappeared years ago at the age of eleven. The most likely explanation is that he fell into the clutches of the infamous serial killer Arnold Avery, now behind bars. This obsession is a burden he inherited from his mother and grandmother, who have never recovered from this tragedy. And to bring them joy, Steven wants to bring them the body so they can finally grieve. However, despite his tireless searching throughout the region, he finds nothing. He then opts for another solution: contacting the killer. Gradually, he establishes a coded correspondence with him to avoid being intercepted by prison staff. Steven has no idea what a dangerous trap he has just set for himself. Because Arnold isn't just crazy and deranged to the extreme; he's also a gambler and has been bored in his cell for far too long. Thus begins a game that threatens to become deadly for Steven!
