Penny Pie is a small black deerhead chihuahua with a pink collar. She gets upset after eating dry dog food every day and decides to run away from home. While away from home, she meets a dark brown tabby cat named Cheetoboy and a small brown chihuahua named Gorda. Penny eventually invites the stray animals to live with her after they help her find her way back home. The three become best friends. These characters are based on real pets.