High school outcast Marty Rantzen is seduced by popular girl Carol in the women's locker room. This is revealed as a prank as several students appear and mock Marty's naked body. Led by troublemaker Skip, the students physically abuse Marty before the coach intervenes. Later, two of the students feign remorse and offer Marty marijuana laced with something to make him sick. Skip messes with Marty's science project, accidentally setting off a chain of events that ends with Marty being doused with nitric acid, disfiguring him.