The car carrying a casting director for Mammoth Picture Studios has a flat tire next to a baseball field where the Our Gang are playing. Bill Patterson, the movie director notices Rover, the Gang's talented dog, as he watches the baseball game, (and his automobile flat tire is being replaced). The casting director invites the gang to bring their dog for a screen test. On the appointed day, the gang arrive at the studio with their high hopes staked upon Rover's success . . .