Ralph S. Mouse cannot imagine living his whole life at the old Mountain View Inn. Sure, it's cozy and his family is there, but there's a great big world beyond the walls where the mice live. And Ralph is determined to see it.

It's just another day at the inn—until young Keith checks in with his family. Ralph can't wait to nibble on the crumbs the boy is sure to drop—until he sees something even better! Keith has brought along some interesting toys, including a miniature motorcycle that looks to be the perfect size for a certain adventure-loving little mouse!