An eccentric scientist tricks the stooges into joining himself and his daughter on an expedition to Venus. On Venus, the boys go exploring and encounter some cannibalistic amazons who plan to devour them. The stooges escape and take off in the spaceship which goes wildly out of control. As the ship is about to crash, the scene changes to the annual meeting of the Liars Club, where the stooges win the prize as the biggest liars in the world.