On Earth, a mix up at a barbecue has Dylan thinking Betty is a vegetarian. In space, Minimus accidentally spills a growth serum on his ant farm, mistakenly creating an army of giant ants which Betty must battle./ Maximus steals the plans to a prototype Galactic Guardian spaceship, and Betty and her crew must infiltrate Maximus' lair to retrieve it. Meanwhile, on Earth, Betty must take Purrsy to the vet, where the precocious feline has a nasty run in with a piranha.