Timothy Hitching has vanished. He was last seen with his girlfriend last night near the Thames. In the meantime, Sherlock feels unsettled - something he knows is happening. Some plan. Some scheme. His assumptions are proved correct when Tim is recovered dying in a horribly mutilated state, and in a state of terror.
That night, the entire electrical supply has been shut down throughout the entirety of London. Hospital patients in critical conditions without life support systems. Communications cease. The world a dark blackness. And a message has appeared throughout the city - demands for billions until the power is restored. Will Sherlock and Dr. Watson be able to save London from a world of chaos and disorder?
Based on the BBC series created by Steven Moffat and Mark Gatiss and Sir Arthur Conan Doyle's detective stories. A CaptainThunderWho Century 22 Production.