Suffering from a rabbit-hangover Bugs accidentally climbs onto a rocket ship parked directly over his hole. He's taken to Marvin the Martian's home where he steals explosives Marvin was planning to use to blow up the Earth.
While Bugs is sleeping, a rocket is placed over his hole. He climbs abord and finds himself in space, where Marvin the Martian has finished his laboratory research and is about to destroy the Earth; it's up to Bugs to save the world.—Jon Reeves <jreeves@imdb.com>