A Sir Arthur Conan Doyle tale...

Set in London, an attorney comes to the aid of a young man who lives alone in a large house. The young man sprained his ankle in the street and the attorney helps him up and into the large mansion. He discovers that the young man appears to live only in one room of the mansion - which he inherited from his father.

Upstairs there is a room with a black door that is locked and sealed with a wax seal. The young man tells the attorney that he has no idea what is in the room and that he is forbidden from opening it until his 21st birthday.

A little later in our story that day arrives. At midnight, along with his new attorney friend, and his fathers most trusted employee he prepares to open the door.