In the fall of 1962, Faber College freshmen Larry Kroger and Kent Dorfman are seeking to join a fraternity. Finding themselves unwelcome at the exclusive Omega Theta Pi house party, the two visit the derelict Delta Tau Chi house next door. Kent believes that Delta will have to accept him as a legacy since his older brother was a member. They meet John (Bluto) Blutarsky, chapter president Robert (Hoov) Hoover, charismatic ladies' man Eric (Otter) Stratton, motorcyclist Daniel Simpson (D-Day) Day, Donald (Boon) Schoenstein, and Boon's exasperated girlfriend Katy. Larry and Kent are accepted as Delta pledges and given the fraternity names Pinto and Flounder, respectively. Meanwhile, Omega pledge Chip Diller is accepted into the fraternity and given a paddling as part of his initiation.
The Delta house is on probation due to regular shenanigans and overall poor academic scores. Wishing to remove the unruly fraternity from Faber's campus, Dean Vernon Wormer elevates the Deltas to double secret probation and directs Greg Marmalard, the Omega house president, to get fellow Omega and ROTC Cadet Commander Douglas C. Neidermeyer to find a reason to revoke Delta's charter. Various misadventures increase the rivalry between Delta, Omega, and Wormer, including the accidental death of Neidermeyer's horse during a retaliatory prank following the bullying of ROTC member Flounder by Neidermeyer. Unbeknownst to Marmalard, Otter has had an affair with Marmalard's girlfriend, Mandy Pepperidge, a member of the Alpha Delta Pi sorority.
Bluto and D-Day steal the answers to an upcoming midterm exam from the trash, unaware that the Omegas have switched it for a fake. All of the Deltas fail the exam, and their grade-point averages drop so low that Wormer tells them he needs only one more misdemeanor to revoke their charter and have them permanently expelled from campus.
Spoken languages: English,Spanish,French,Japanese,Italian
Subtitles: Danish,Swedish,Norwegian,Finnish,French,Italian,Spanish,Japanese
