Socks and Mittens are relaxing on their starship, enjoying some premium catnip, when they come to the rude awakening that their ship has been invaded by mice, namely Pinkie and Twitchy. These space-going, cocaine-addicted mice, sworn enemies of the cats, are waving their blasters and demanding to know the location of the Feline doomsday device. The device is discovered and set off in a chaotic scene. But just when it seems that Socks and Mittens have emerged victorious, the possibility of a new Doomsday is reloaded in a new and more dizzying form.