Pup Academy celebrates a special day of student reviews, Charlie shares a meaningful gift with Morgan, and King's dark past comes to light.

Spark is finally feeling like she's found a place she belongs ...until King calls in the favor she owes him. Now Spark must decide whether to honor her commitment to her paw-pact with King - or betray Pup Academy and all of her new friends.

The greatest friendship on earth is at risk when the constellation that powers Pup Academy fades out and humans no longer want dogs as best buds.