Erik Stifler (John White) has a difficult time living up to his family name. He is Steve and Matt Stifler’s cousin. He is perhaps the only Stifler about to graduate from high school as a virgin. The film opens with Erik feigning illness so that he can stay home andmasturbate. Unfortunately, just as he is about to ejaculate, his parents and grandmother unexpectedly walk into the door and are hit with Erik’s semen, after which his grandmother dies of a heart attack. Erik’s dad later surmises that, as a Stifler, his son should be out having sex instead of masturbating. Erik’s girlfriend of two years, Tracy (Jessy Schram), loves him, but is not ready for intercourse. Tracy decides to have sex, their first attempt goes horribly wrong, and she backs out of trying again.
Erik’s friends Cooze (Jake Siegel) and Ryan (Ross Thomas) plan a road trip to visit Erik’s cousin Dwight Stifler (Steve Talley) in Michigan during an event known as the Naked Mile. Tracy sees this as an opportunity to give Erik a “guilt free weekend pass,” hoping that he can quench his lust and get sex out of his system since she is not ready.