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?!

The war is over, the sensates are safe, and Wolfgang finally got everything he ever wanted. Now, the morning after his entanglement with both Kala and Rajan, there is only a single question left to answer: What now?