London high-society mouse, Roddy is flushed down the toilet by Sid, a common sewer rat. Hang on for a madcap adventure deep in the sewer bowels of Ratropolis, where Roddy meets the resourceful Rita, the rodent-hating Toad and his faithful thugs, Spike and Whitey.

Eleven-year-old Beanie's bland life is changed for ever when he is sent on a mission. Armed only with laser lip-gloss and a pair of blend-in pants he has to save his parents from Evil Stella and return the Golden Nit to its rightful place at the heart of the sun, thereby saving the universe.