Chance, a real dog, has been in the Dogtown shelter since her owners unwittingly left her with irresponsible dog-sitters who skipped town.

Metal Head is a robot dog who dreams of being back in a real home. And Mouse is a mouse who has the run of Dogtown, pilfering kibble and performing clever feats to protect the dogs he loves.

When Chance and Metal Head embark on an adventure to find their forever homes, they find danger, cheese sandwiches, a charging station, and some unexpected kindnesses along the way.