Seven-year-old Christina desperately wants a dog. When she visits a kennel with her parents, she comes home with Prince, a greyhound recently retired from his champion racing career. Christina is thrilled and spends all her time with her new pal. They are like two peas in a pod. But one day, when Prince is left alone in the backyard, he escapes. Christina's mother searches everywhere for him only to find him at the schoolyard gate waiting for Christina. Promising never to leave him alone in the backyard again, her father brings home a little Chihuahua named Chancho. Now Prince will always have a companion to play with.