Peterson, a crew member of a spaceship loading up with food animals on Mars, buys an enormous pig-like creature known as a 'wub' from a native just before departure. Franco, his captain, is worried about the extra weight but seems more concerned about its taste, as his ship is short of food. However, after takeoff, the crew realizes that the wub is a very intelligent creature, capable of telepathy and maybe even mind control. Peterson and the wub spend time discussing mythological figures and th