Charles and Lizzie Peterson are very good with puppies. They want one of their own, but their mom isn't ready for them to have one full time. For now, they help take care of puppies that need to find a new home. They are a foster family for young dogs. The Peterson kids hear about Snowball. Someone left the fluffy puppy all alone at a gas station in a tattered, old box. Snowball is sick and hungry. He needs a family of his own. Can Charles and Lizzy find one that is just right?