The body of a child, horribly tortured, is found at the mouth of the river Tiber. The Brutal Crimes Investigation Unit is in charge of the investigation. Deputy Commissioner Marco Gottardi and his agents are committed to discover the people responsible for this murder quickly because they fear that other children might be in danger. During the investigation, BCIU receives the unexpected and unwanted help of a secret association called BOW, whose members believe it is right to make criminals confess using violence.