46 days ago,
From dramatic events since the end of the last episode have elapsed for two years. We only know that Sherlock lives. He was thrown out of the roof of St. John's Hospital. Bartholomew, yet he lives. For the world, however, he remains dead. To cope with his death, it was hard for John Watson, but now he seems to have finally turned the leaf and moved on. His restored peace of mind, however, does not have a long duration. London is threatening a massive terrorist attack, which aversion is demanding for Sherlock's genius. Detective rises from the dead, but to his surprise things do not develop the way he imagined.