A dark land filled with shadows and strange noises. A multiheaded beast standing guard. A new, sly ruler with a few tricks in store. A lack of Mutt Nuggets to fill Ares the pug's belly ... The Olympians of Mount Olympus Pet Center have never faced a challenge quite like this. With Zeus the Mighty trapped in his palace by an all-seeing guard dog named Cerberus, it's up to his gaggle of gods and goddesses to figure out how to rescue him...