A sudden rainstorm floods Bugs Bunny's rabbit hole and puts him in the path of an Evil Scientist and of Rudolph, a beast that is covered in orange fur and shod in sneakers.
Bugs Bunny is too sound a sleeper to notice that a rainstorm has flooded his rabbit hole and sent his mattress floating downstream toward the castle of an evil scientist who needs a brain for his mechanical monster. Bugs tries to escape and save his brain from the clutches of Rudolph, the scientist's giant orange monster.