Randal Reese-Rat is mad with jealousy, believing Montague Mad-Rat has stolen Isabel, his former bride-to-be. His feelings are no secret on his wharf, and when an unthinkable crime is perpetrated against Izzy and Monty on their wedding night, Randal is the prime suspect. Now on the lam, with a price on his head and thugs on his tail, Randal involves animal friends of his in a perfect and horrible revenge on the whole rat colony. But his plans are hopelessly complicated when a new rat enters his life, an exotic she-rat who shares his unusual interest in non-rat species -- and who also happens to be a cousin of his nemesis.