Parents Biff and Weez, along with their teenagers Miff and Jeez, head off on their annual family vacation in their small space craft. Family games along the way? Sure, including a new version of the license plate game. Snacks to tide them over? Mom suggests Kantare kale crisps, Ceti Alpha carrots, Omicron orange slices. Ugh! In the meantime, Biff tries a shortcut, joining the slipstream of the Galaxy Express Starship.
But the Biffs drop out in an unknown galaxy that looks like spilled bantha milk. Miff needs a rest stop. Two choices: the red planet or the blue one. Otherwise, it's 2.5 light years to the next one. The blue one it is. But the ship is damaged upon entry and the family has to wait five orbits for a tow. When it finally arrives, everyone but Jeez is ready to leave. He likes it where he is; after all, he has big plans. Hmmm, wonder what they are?