Jim Levenstein has finally found the courage to ask his girlfriend, Michelle Flaherty to marry him. She agrees to get married, but the problems don't stop there for Jim. Now along with Paul Finch and Kevin Myers, Jim must plan the wedding. Unfortunately Steve Stifler is in town and won't let the wedding go past without having some fun himself, which includes setting up a secret bachelor party.

18-year-old Matthew Kidman is a straight 'A' over-achiever who feels that he has never really lived life to the full. That is, until he meets 'the girl next door'. Danielle moves in next door, and Matthew thinks he's found the girl of his dreams. All is going well, until Matthew's sex-mad friend Eli reveals that Danielle is actually a ex-porn star. Matthew doesn't know how to take the news or how to treat Danielle, and things go from bad to worse when Danielle's former producer Kelly appears to...