Sibyl-Anne and her fiancé Boomer live in blissful peace in the French countryside... until the evil rat Ratticus, evicted from his previous residence, sets his eye on the quiet acre that the couple share with their friends (a porcupine, a crow, and a rabbit). After a hilariously unsuccessful attempt to infiltrate the quiet little community in drag (which leaves a member of the cast smitten, Some Like It Hot-style), the devious Ratticus engineers the takeover of a neighboring rat colony and builds it into an army that sweeps Sibyl-Anne and her friends off their homestead and onto an island. Battles by land, by sea, and even by air ensue, until finally the wicked are defeated and peace is restored.