Oscar the sausage dog is the yappiest dog in the universe, and none of the visitors to the Pooch Pound want to take him home. When the Spacemutts are called to rescue a ship full of rebel chihuahuas, they agree to take Oscar with them as long as he keeps quiet. But all is not as it seems, and in the battle against the evil Lady Fluffkins and her silent-but-deadly Siamese samurai, only a dog as loud as Oscar can save the day!