Roddy, the pampered pet mouse, has it all in his posh Kensington Gardens apartment. He even has the run of the house when his owners leave on vacation. However, things will take a turn for the unexpected, when the obnoxious sewer rat, Sid, arrives through the pipes and gets a taste of luxury that is so sweet, he swears never to return to Ratropolis. Unfortunately, as Roddy tries to get rid of his uncouth and unsophisticated guest, before he knows it, he gets flushed away into London's cold and dank sewage system, and the hidden kingdom of rats. But, there, love awaits in the person of Rita, a young and feisty rat girl. Nevertheless, more than anything in the world, Roddy wants to get back home. Can he manage to escape from the evil crime boss Toad's realm?—Nick Riganas