Presents the further adventures of a motorcycle-riding mouse who goes to school and becomes the instigator of an investigation of rodents and the peacemaker for two lonely boys.
In a series of diary entries, Leigh tells how he comes to terms with his parents' divorce, acquires joint custody of an abandoned dog, and joins the track team at school.
In his letters to his favorite author, ten-year-old Leigh reveals his problems in coping with his parents' divorce, being the new boy in school, and generally finding his own place in the world.
Using a mysterious wardrobe that allows them to travel through time, two eleven-year-olds, Federico a boy from the Italian Renaissance and Bee a girl from present-day New Jersey, work together to prevent the bickering between two great artists from changing the future.