The young nobleman Samuel Gordon left the Black Mirror estate in England 12 years ago after his wife Catherine died in a fire. In 1981, however, he returned to the estate because of the death of his grandfather William. Grandmother Victoria and Detective Collier believe it is suicide. But Samuel doesn't believe it and he's looking for his grandfather's murderer on his own.
The story reveals a ghostly element of the Gordon curse, which affects only the male descendants of the Gordon family. The perpetrator of this curse is the ancient ancestor Mordred, the younger of the Gordon brothers, the founders of the estate. Another suspicious deaths occur during Samuel's search. Samuel's search for the curse, using the "keys of the souls" takes him to the nearby village of Willowcreek, Warmhill Parish, Dr. Hermann's autopsy room, the mansion, the Ashburry Sanatorium, and more.
