At the borders of evil, a film directed by Vincenzo Alfieri, focuses on a disappearance, that of two young people who disappeared following a rave in a wood, located near a remote village. Two carabinieri, Meda and Rio, are called to investigate the case. The first is a man who has been through a lot and has now surrendered to life; the second, on the other hand, is a captain with a rigid, correct and detached character, especially in investigations. The research will lead to believe that the cause of the disappearance of the two boys is associated with a "monster" that had already acted in the past. This time though, it looks like the killer kidnapped the wrong people ...