Bud "Squirrel" Macintosh and Doyle "Stubs" Johnson are best friends who live together. Bud wins a round of Rock, Paper, Scissors and gets to hit Doyle in the head with a book. Their girlfriends Monique and Jen, who are environmentalists, arrive to take them to an Environmental Party when they discover the injured Doyle. The girls learn that the book was used to injure Doyle as an excuse to not go. Annoyed at the boys' lack of respect for the environment, the girls call the boys from a payphone to announce they'll be joining some hot swim team guys at a party down by a lake. Bud and Doyle drive out to the lake, only to find they have been had.