“Eternity is really rather boring, John. Mortal life seemed as though it would be far more interesting.” Sherlock is actually the Devil, but he decided to live as a mortal because ruling Hell was boring.

“My high school reunion is on,” John tells Molly. There’s a short pause as she processes this. “That sounds like fun,” she offers. “Do you want to go?” “Oh yes, because that couldn’t possibly go badly. ‘Hello, I’m John Watson, I’m a professional killer.’ ” A Grosse Pointe Blank AU.

John, Sherlock, and Mary are married. No one knows. Except Molly. Who's helping Mary with a murder. While Sherlock proposes to Janine. Who's working for the guy who's blackmailing Mary and who Mary's planning to kill. Which neither John nor Sherlock know. What could go wrong?!