Now that the eponymous pup has settled into his happy suburban home, he's decided it's time to go out and have a family of his own. So Beethoven meets and mates Missy, another friendly St. Bernard. But when Missy becomes a pawn in her owners' vicious divorce settlement, she and the pups are endangered. It'll take some careful scheming on the part of some very brave kids to save the day and the puppies too.