Ralph, now an adult, still lives at the Mountain View Inn, a fading ski resort near Cucaracha, California.

His relatives always beg him to give them rides on his motorcycle, but their constant demands are wearing both his tires and his nerves thin.

As they watch a car stunt show, Ryan says he has a classmate named Brad who races motorcycles, and Ralph thinks he might like to meet him.

The next morning, Mr. Minch scolds Matt for not doing his job and threatens to fire him if he doesn't eradicate the inn of all mice.

The time for the grand finale arrives, and Ralph trembles with fear as Ryan places him in the maze.

Using his creativity, Ralph scales the wall and easily traverses the top of the maze to the end reward.

When the students return to school the following Monday, they bring the latest edition of the newspaper, which features the reporter's story on the exhibit.

Brad accompanies Ryan home on the bus, and the two boys learn that they each hold unfair assumptions about one another.

Amazed at his new hot rod, Ralph slides in the seat and tries to start it with the same sound he used for the motorcycle, but it doesn't work.

Ryan reads the newspaper and sees that in response to the class's letters, the reporter printed a retraction to the mouse infestation story.

Ralph reflects on all he endured at school but decides it was worth it if Ryan made a new friend and he learned to better communicate with his relatives.

Since Brad has a dog named Arfy, Ralph remains at the inn, safely tucked away under the grandfather clock during the day and racing his car at night.

Churchill Films produced an adaptation of Ralph S. Mouse in 1990, directed by Thomas G. Smith, and animation directed by John Clark Matthews, starring Robert Oliveri as Ryan and featuring Ray Walston as Matt, reprising his role from the previous adaptations.