When the Grogan family goes on vacation, Marley is left with Bodi, their 12 year old nephew and his no nonsense grandfather, Fred. To prove he is able to take care of a dog of his own, Bodi decides to train a team made up of Marley and two other neighborhood puppies for the local puppy agility challenge. Little does Bodi know that the world's worst puppy may just be his secret weapon.