Sherlock Holmes and the Nightmare in the Mansion

When a pale faced policeman comes to the door of 221B Baker Street, Sherlock and John regard it as nothing more than a witness to a murder. But it's much more odd than that. When Sherlock, John, and Lestrade find themselves trapped in a mansion, they have to find a way out and also solve the case. Will they survive, or will they perish in this haunted mansion?

Disclaimer: I don't own the characters. This was done for a contest on here. IF YOU CANNOT HANDLE SCARY THINGS, LEAVE. YOU WERE WARNED. The description of the Haunted Mansion and some of the elements belong to Disney.