large Kensington apartment. While his owners are gone away on holiday, a sewer rat named Sid spews out of the sink's drain and decides to stay and watch the 2006 FIFA World Cup Final. Roddy attempts to get rid of Sid by flushing him down the toilet, but Roddy instead gets flushed down the sewers by Sid. Roddy finds himself in Ratropolis, a sewer city made out of various bits of junk that resembles London. He is told to seek out Rita Malone, an enterprising scavenger mouse who works the drains in her faithful boat, the Jammy Dodger who can possibly help him get home. Roddy and Rita are abducted by rats Spike and Whitey and brought before their boss, the Toad, as Rita stole back a prized ruby originally scavenged by her father. The Toad plans to have Roddy and Rita frozen with liquid nitrogen, but the pair escape. Rita takes the ruby, and a unique electric master cable required to control Ratropolis' sewer floodgates. Roddy deduces that the ruby is a fake and easily shatters it, enraging Rita. Roddy offers Rita a real ruby if she takes him back to Kensington, to which she agrees. The pair first stop to visit her family before setting off. During Roddy's stay, he overhears a conversation that causes him to assume that Rita is selling him out to the Toad, so he reneges on the deal and steals the Jammy Dodger. When Rita catches up to him, she is able to clear up the misunderstanding. The pair evade pursuit from Spike, Whitey, and their accomplices. Incensed at his minions' repeated failures, the Toad sends for his French cousin, Le Frog. It is revealed that the Toad was Prince Charles' favorite childhood pet until he was abruptly replaced by a rat and flushed down a toilet, resulting in his hatred of rodents. Le Frog and his subordinates intercept Roddy and Rita to retrieve the cable, but the duo manages to escape out of the sewer drain and back to Roddy's apartment, though the Jammy Dodger is destroyed. Roddy pays Rita the promised ruby and an emerald, then shows her around his apartment. She at first believes he has family, but notices his cage and realizes he is a pet and alone. Rita tries to persuade Roddy to come with her, but he is too proud to admit his loneliness and rebuffs her.