Bucky Larson is a simple-minded, uneducated, beaver-toothed young man still living with his protective parents, Jeremiah and Debbie Larson, in a small Iowa town. Initially saddened when he is fired from his job as a bagger at a supermarket, he eventually sees it as a sign that he is destined for greatness in another field. Based on information he learns, Bucky believes that destiny is to become a porn star, despite being a virgin who has only recently learned about masturbation. With his parents' blessing, Bucky hops on a bus to Los Angeles to make it big there as a porn star and is taken under the wings of a few people in LA. On the professional side, he meets the reigning king of porn, Dick Shadow, who only sees him as a laughingstock. Then washed-up porn director Miles Deep stumbles across what he sees as an untapped niche market for Bucky's limited talents and must try to convince investors who see Bucky as the exact antithesis of porn. On the personal side, Bucky befriends young diner waitress Kathy McGee, who helps him find a place to live--albeit with an insensitive oaf named Gary who only wants to get into Kathy's pants--and navigate general life in the big city. Kathy is facing her own demons as she works toward her destiny, and Bucky hopes he can help her.