Bucky Larson (Nick Swardson), a small-town manchild with big buck-teeth, stumbles upon a family secret: His quiet and reserved parents (Edward Herrmann and Miriam Flynn) were famous porn stars in the 1970s. This motivates him to leave northern Iowa for Hollywood, hoping to follow in their footsteps and fulfill his destiny as the biggest adult-film star in the world. Unfortunately, he has no idea how to become a porn star like his parents, and his penis is incredibly small.