Ciel is informed that the abandoned Ludlow Castle that his estate owns is haunted by ghosts and the workers are too spooked to continue remodeling it into a hotel. He and Sebastian head to the castle to investigate. There they encounter the ghosts of two princes who were assassinated four centuries ago, Edward V and his younger brother Richard, Duke of York. Ciel plays a game of chess against Edward V to pass the night, but the former loses and the latter claims Sebastian as his winnings. Sebastian must serve as butler for both Edward and Richard, an order made by Ciel himself. Come nightfall, Ciel and Sebastian find a secret passageway inside the library of the castle. Edward shows them the skulls of his family on a chessboard, revealing that Richard has the missing knight chess piece. After a struggle to obtain the skull from the clutches of Richard, it is unveiled that Edward was holding a grudge against the very man who assassinated the two princes. Once the mystery is solved, the princes thank Ciel and Sebastian before departing for the afterlife, and Ciel says he will leave the castle as is with no new renovations just before they depart. The two princes however, did actually disappear from the Tower of London.