A group of eleven street criminals between the ages of thirteen and twenty have raped and killed a teacher. There’s no evidence or even enough information to determine why they did it or if they had a motive. The judge wants the case closed, but Chief Luigi Càrrua (Enzo Liberti) knows that only Commissioner Lamberti (Pier Paolo Capponi) can solve it. He’s brutal on the boys, while social worker Livia Ussaro (Nieves Navarro) tries to understand how they could be this way. Once the main witness is killed, the rough cop discovers that this case may be more difficult to figure out than he thought it would be.

Based on the book by Giorgio Scerbanenco, director and co-writer Fernando Di Leo cut down the story and concentrated on the boys who have actually committed the crime.

He would also adapt two other books by the author, Caliber 9 and The Italian Connection. Scerbanenco’s books were popular stories to turn into movies, as Yves Boisset made Safety Catch from Venere privata (A Private Venus), Duccio Tessari directed La morte risale a ieri sera (Death Occurred Last Night) from the book Milanesi Ammazzano al Sabato (The Milanese Kill on Saturdays), Luigi Cozzi directed The Killer Must Kill Again from Al mare con la ragazza (By the Sea With the Girl), Carlos Saura directed ¡Dispara!, Romolo Guerrieri made Young, Violent, Dangerous from two short stories “Bravi ragazzi bang bang and “In pineta si uccide meglio,” plus TV movies include the Alberto Siron, Gian Pietro Calasso and Vittorio Melloni-directed  Quattro delitti, the Daniele D’Anza directed La ragazza dell’addio, Bruno Mattei’s Appuntamento a Trieste, L’uomo che non voleva morire by Lamberto Bava and Occhio di falco by Vittorio De Sisti.