To help combat a string of cat burglaries throughout the city, Commandant Lassard welcomes the latest addition to the Police Academy family, a group of police dogs known as the K-9 Corps. When the infamous Claw crashes a masquerade party and steals the Queen's crown during her royal visit, it's up to Mahoney and the gang to save the day, while trying to avoid Harris' and Proctor's attempts to shut down Lassard's pet project.