Medea and her family became low on money to the point that all of their house's furniture is removed. On Buck's birthday, he wishes that he and his family have a home with furniture, and at that moment, the family discover that they have inherited Cyrus's late uncle's mansion. Medea and her family quickly move into the mansion, which includes an eerie servant, Elaine Zacharides. However, Medea and her family soon discover that the house is haunted by twelve vicious ghosts.
One night, Elaine convinces Cyrus, Hilda and Medea to join her and have a seance. During the seance, Plato's ghost temporarily possesses Cyrus, and through him, uses cryptic messages to try and warn the family that the other eleven ghosts will try to make one of them the thirteenth ghost. However, Medea and the family fail to crack the code.
The day after Ben Rush was killed trying to silence Buck from revealing the house's hidden treasure of money, Medea and her family discover the money, and consider using it to move to another house.