Timothy Frisby, a field mouse, teams up with the adventurous young rat Racso.

After their father goes to New York to study art, 13-year-old Shana Allen and her younger brother, Cody, travel to Maryland with their mother. While Mrs. Allen starts a new job, Shana and Cody fix up the secluded cabin that will be their home for the summer. Shana greatly misses her father. But as the weeks pass, she realizes that she is relying on a fragile web of hope: her father may not ever come back. As summer ends, Shana feels her loyalties...