Roger tries to play it cool when his fickle former girlfriend, Lorraine, comes to town.

Roger becomes concerned that Flip is falling under the influence of a gang of hoodlums who drink heavily. Flip tells his big brother to butt out of his social life. One night, the teen-agers get very drunk and become involved in a hit-and-run accident. The victim: Heather, making Roger's reaction the least of Flip's worries. What will the police - and Fonzie - say when they have their turn with Flip?