Charlie Pringle has a dream. He wants to own a mountain bike and go cycling in the hills. Not a very practical idea when you live in town, next to a canal and a derelict shoe factory. Undeterred, Charlie sets out to earn some money. At the same time, Charlie's class is studying the Second World War, looking for heroes. Charlie's visit to old Mrs Tyrer and the accidental discovery of the mouse in the teapot trigger an adventure into the past and teach...