To celebrate Appie's birthday, the Anubis residents rent an old haunted house. However, strange things start to happen when the friends disappear one at a time.
When Mammie and Stan are freed from jail the two once again set their sights on eliminating the Black Petes and Saint Nicholas.
Because of a misunderstanding, Plop turns into the new king! Klus, Kwebbel and Lui move to the palace, while Plop is trained to become royalty, but what happened to the real heir of the throne?
