When two church mice are forced from a comfortable living, migration in search of new quarters exposes the tiny pair to the rawer side of mouse existence, where vulnerabilities evoke some frightful days that could be their last. Grappling with the liabilities of small body size and brief lifespans, hope of survival relies on sheer will until an assuring friendship and real need of help comes from an unexpected canine foe turned friend. In time the pair of struggling mice show themselves capable of withstanding grave predicaments. This they do by gratitude for each other and affection for a junkyard dog seemingly having suffered rejection by life itself and a separated mate he still loves.