Cooperating with the police in order to revenge his father's death, Frank joins a youth syndicate master-minded by the sadistic Alex. When members become suspicious, Frank must cooperate with the gang activities in order to prove his loyalty. Now personally involved and unable to contact the law or his girl friend, Frank's true identity is revealed to brutal leader whose anger he must now face. Meanwhile the selfish disloyalty of the boss is revealed and in bitter hatred the most trusting youth of the syndicate turns on the leader.

The Black Widows, a teenage girl gang, find one of their number killed. They blame her murder on Barbara, the on-again-off-again girlfriend of the leader of rival gang The Vandals. As the gangs prepare for a fight, we take a glimpse into their tumultuous home lives.

Roger Corman's post-holocaust quickie about an adolescent tribesman who dares to explore the feared "forbidden zone."