The "Brigate Veleno" is a group of hooligans of the soccer club AS Roma. Principe, the former leader, has just been released from jail. He realizes that his best friend Red has taken over the control of the group, beside starting an affair with Principe's girlfriend. The rivalry between the hot-blooded men causes an anxious mood within the group. When Smilzo, a member of the group, dies during a street fight, Red blames Principe for the tragedy.