Andy Stitzer has a pleasant life with a nice apartment and a job stamping invoices at an electronics store. But at age 40, there's one thing Andy hasn't done, and it's really bothering his sex-obsessed male co-workers: Andy is still a virgin. Determined to help Andy get laid, the guys make it their mission to de-virginize him. But it all seems hopeless until Andy meets small business owner Trish, a single mom.

At a high-school party, four friends find that losing their collective virginity isn't as easy as they had thought. But they still believe that they need to do so before college. To motivate themselves, they enter a pact to all "score" by their senior prom.

Ten years after the first American Pie movie, three new hapless virgins discover the Bible hidden in the school library at East Great Falls High. Unfortunately for them, the book is ruined, and with incomplete advice, the Bible leads them on a hilarious journey to lose their virginity.