Beverly Cleary's classic story about the friendship between Ralph, a talking mouse, and Keith, a boy with a toy motorcycle. Roaring up and down the hallway of a hotel, Ralph creates chaos, but then risks his life to help save Keith when he falls ill.

The third of Beverly Cleary's beloved stories of Ralph, a motorcycle riding, rumbustious, talking mouse. When hotel doorman (Ray Walston) almost loses his job, Ralph hitches a ride to school in the pocket of a boy, Ryan, where adventures await.

Ralph runs away looking for freedom but winds up a prisoner at a summer camp.