When the newlywed John and Jennifer get a dog that they name Marley, they have no idea what Marley has in store for them. As the family grows, Marley never loses the enthusiasm and playfulness of a puppy, even as he grows into a large dog
The naughty puppy Marley enters a local dog contest with his summer pal, Bodi Grogan, and they face many adventures as they compete with the ruthless defending champion, Hans Von Weiselberger.