It’s 1984 and three twelve-year-olds, best friends who live in Knocknaree, Ireland, are playing in the woods. By nightfall, two of them are missing and the last boy, Adam Ryan, is found, traumatized, in a tree with a sneaker filled with blood, gashes in his clothes and gaping holes where memories of that day’s events should be. Despite intensive investigation and media scrutiny, the case is never solved. Years later, the boy is now a homicide detective in Dublin, and a case from Knocknaree comes across his desk. A child’s body has been found in those same woods. As Detective Ryan proceeds to investigate, he is desperate to bring this killer to justice and perhaps to figure out what happened that day in 1984.