The adolescent Kelly Hankins (Sean O'Donnell) has a good life. He's admired by his peers, the star of the baseball team, and he's in a happy relationship with the beautiful Lisa Weld (Allie DeBerry), albeit one that they have to hide from her strict father Reverend Weld (Stephen Tobolowsky). However when Lisa tells him that she's pregnant, Kelly now has to figure out a way to keep her from getting into trouble. He thinks he's found the answer when he discovers that his Uncle Theus (J.D. Rudometkin) has managed to transfer an embryo into a male monkey. Certain that this will solve all of their problems, Kelly persuades his uncle to do the same to him.
