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.
|nudity||While tied together back to back, Rita tells Roddy to reach into her back pocket for a paper clip, but she then exclaims "Oh" and "I said my back pocket" (indicating he accidentally felt some other part of her bottom). When Roddy and Rita are escaping toad Rita's belt breaks exposing her underwear to Roddy who is talking about sights he wants to see before he dies and he says Rita's butt is not one of them Characters continually hit their crotches on things. An old lady rat tosses a pair of bloomers at Roddy. A rat calls Roddy a peeping tom. Rats kiss and hold hands.|
|violence||Spike and Whitey end up being partially frozen by liquid nitrogen while trying to subject Rita and Roddy to the same. As they chase after them (still partially frozen together), Whitey accidentally slams Spike into a column and the two of them then fall onto others. Spike and Roddy both hit their crotches numerous times of pipes and various sewage construction materials. Rita's beloved boat, made from a child's grabbing-robotic-arm toy, is sentient, and it falls into the rapids at some point, falling apart and getting destroyed by the water. Spike threatens Roddy with a corkscrew. Slugs are stepped on numerous times. A little girl brings a pet cat home for her rat to play with. It's implied that the cat will eat the rat.|
|profanity||A lot of name calling and insults (stupid, dipstick, get stuffed), a couple of mild anatomical references (booty), a couple of mild profanities, one religious exclamation in French.|
|alcohol||As part of Rita's house falls apart, we see a roach sitting as if on a toilet with a pipe and reading material. Le Frog is seen drinking wine.|
|frightening||Roddy hears strange sounds inside the house, slowly goes to look, and then sees a muddy eruption from the kitchen sink. But he doesn't see a mud-covered figure, looking like a monster, coming up behind him with its arms reaching out (but it turns out to be Sid who has no ill wishes toward him). After Sid flushes him down the toilet, and he travels a long way, Roddy pops out of the system and finds himself far above the city, falling toward it. However, he turns out to be just a few feet above a sidewalk drawing (depicting an aerial view looking down) upon which he lands. Spike, Whitey, and others chase after Roddy and Rita in her boat through the city on its "river." One rat bounces off a large float into another rat, while Spike ends up on the boat, standing on Roddy and preparing to stab him with a corkscrew or something similar (attacked to a line trailing behind him). Rita then hits the propellant, Spike's line goes taut, and he's yanked backwards off the boat, wraps around and slams into a pipe several times, and then lands on a pipe on his crotch. Rita's boat goes through a river passage labeled as dangerous, and the rapids are rough as Rita battles with Le Frog. The boat then blasts out into an opening, with its mechanical arm grabbing a pipe above it. That results in the boat dangling vertically from it, with Roddy falling and Rita catching him (as she dangles from the end). Le Frog then dislodges the hand's fingers from the pipe, causing the boat to fall. But Roddy and Rita quickly create a makeshift parachute, with the updraft lifting them up and above Le Frog (although her boat crashes into the whirlpool below and sinks). Roddy finds Rita tied up, dangling in front of a floodgate that's opening (and will allow a tidal wave of toilet water to wash over her and the city). Roddy then flies up to her on a balloon of sorts, with Toad firing staples at him (like a machine gun), eventually popping the balloon.|