The story of an uptown rat that gets flushed down the toilet from his penthouse apartment, ending in the sewers of London, where he has to learn a whole new and different way of life. Roddy is a decidedly upper-crust "society mouse" who lives the life of a beloved pet in a posh Kensington flat. When a sewer rat named Sid comes spewing out of the sink and decides he's hit the jackpot, Roddy schemes to rid himself of the pest by luring him into the "whirlpool." Sid may be an ignorant slob, but he's no fool, so it is Roddy who winds up being flushed away into the bustling sewer world of Ratropolis. There Roddy meets Rita, an enterprising scavenger who works the sewers in her faithful boat, the Jammy Dodger. Roddy immediately wants out, or rather, up; Rita wants to be paid for her trouble; and, speaking of trouble, the villainous Toad - who royally despises all rodents equally, making no distinction between mice and rats--wants them iced... literally. The Toad dispatches his two hapless hench-rats, Spike and Whitey, to get the job done. When they fail, the Toad has no choice but to send to France for his cousin - that dreaded mercenary, Le Frog.

Set during the opening days of World War II on the Eastern Front. Its main cast are a group of Soviet teenagers with extraordinary abilities; the teenagers have been drafted to form a special unit to fight the invading German army. They are opposed by a Schutzstaffel (SS) officer who is attempting to raise from the dead a supernatural army of crusaders from the 12th-century Order of the Sacred Cross and enlist them in the Nazi cause.