Chester is a foolish, immature mouse from the mean streets and alleyways of Liverpool. Unlike any other rodent around here Chester lacks the natural instincts to keep himself out of danger. Chester is a magnet for trouble and calamity, often placing himself, and therefore those he cares about, directly in harms way. In a characteristic show of stupidity Chester brings about the demise of a dear friend, Giblet. Whilst mourning that loss Chester's world is turned upside down, as the derelict house he calls home is ripped apart by builders sent to restore the old shell to its former glory. Panic-stricken, every mouse seeks sanctuary wherever they can, whilst Chester jumps straight into one of the builders toolboxes. For the first time Chester is forced to leave behind the only home he has ever known, and is thrust into a terrifying world where even the wiliest mouse would never dare tread. Confronted by Humans, Cats and an army of mice under the rule of the dictatorial Victor, Chester must summon up the courage to lead a small band of new found friends, including the beautiful Arabella, to escape the endless perils that they are subjected to. So begins a thrilling journey where danger lurks every step of the way as they attempt to return to the safety of Liverpool.