Jack, the new arrival at Barkley's School for Dogs, gets off to a rough start when he chews the bully Doberman's toy, but when someone else needs some protection, Jack soon learns that popularity is not quite as important as true friendship.

Creative, impulsive Logan vows to turn over a new leaf in fifth grade so his parents will let him have a pet, but when a competitive new girl arrives at school and his forgetful and embarrassing grandfather takes over the basement of Logan's house, doing the right thing becomes harder than it has ever been.