Lottie and Jack are two mice who live on a farm. They are blissfully happy - except for Angus the Cat, who is mean, nasty and downright dangerous.
He steals their Christmas lunch and even makes sure they have no presents on Christmas Day. The little mice decide to visit Gavin the rat (or Ton Chi, as he prefers to be called), to see if there is any way they can sort out their problem. On the way, they discover a beautiful little golden bell, which gives the wise old rat a brilliant idea of how to help his friends.