Long buried secrets finally come to light as someone has been playing a very long game indeed. Sherlock, (y/n) and John face their greatest ever challenge. Is the game finally over?
Sherlock faces one of the most chilling enemies of his long career: the powerful and seemingly unassailable Culverton Smith - a man with a very dark secret indeed
Mycroft calls Sherlock back to London to investigate an underground terrorist organization. He also reunites with his best friend, John Watson and his girlfriend, (y/n) (l/n).
Mycroft needs Sherlock's help, but a remorseless criminal mastermind puts Sherlock on a distracting crime-solving spree via a series of hostage human bombs through which he speaks.