Spunky the dog would be happy to share all of his secrets, if only his human family spoke his language. But no matter how hard he tries to talk, it's all "yerf!" to them. Through a series of unfortunate miscommunications, his family decides that Spunky wants a friend--specifically, a cat. Spunky can't imagine anything worse than having to share his family, especially Huey and Julian, with the snobby  Balinese Fiona. But when headstrong Fiona keeps getting into trouble and it's up to Spunky to save her, he is astonished to find that being her protector has given his life new purpose and meaning.