Red Door Black

There is a house in old Soho, a house which has many secrets. A house which should be left alone. But when Sherlock Holmes tempts both Molly Hooper and John Watson inside this house one Halloween, he has no idea what he's unleashing or the price to be paid for his curiosity. After all, there's no need to fear the dark- Is there? And what sort of detective believes in ghosts anyway?