Fonzie,after being called "normal" by a woman he's dating,is re-uniting with his old gang and they're confronted by rival gang "The Warmongers" at Arnolds to settle an old score. Meanwhile, Joanie is avoiding Chachi after discovering he had spent time with a girl at the lake while she was working there that evening.

Joanie is furious because Chachi likes to date other girls, so she gets her revenge by dating a college man.