Three nerdy frat boys, Calvin, Jimmie, and Keith, follow and spy on the Tri-Delta sorority group, which is holding an initiation ceremony. Sorority members Babs, Rhonda, and Frankie prepare for the ritual while newcomers Taffy and Lisa wait. Observed by the frat boys outside their house, the two initiates get spanked from a paddle and are sprayed with whip cream during the initiation. While the girls clean themselves, the boys enter the house; the girls catch them there. The boys are then sent, with the pledges, on a mission to steal a trophy from a nearby bowling alley. Unbeknownst to them, Babs's father runs the mall where the bowling alley is located and watches the group through security cameras.