After a bad day at Pup Academy, which makes Spark question where she belongs, Spark is ready to quit the Academy for good. But when she skips school to hang with King and the Lost Dogs, Spark learns the grass isn't always greener on the other side.

It's time for the annual student exchange, and Pup Academy is getting ready to welcome a - kitten. Spark tries to hide her secret friendship with this kitten from her judgmental classmates, as Corazon discovers cats aren't as bad as he thought when he's sent to Kitten Academy to learn about acceptance.