Modern day London.

A proud day for a very proud man, and why shouldn't he be? Mayor Boris has worked so very hard, and is now launching his new driverless tube train on the pioneering Tower Line.  But while some consider the line a triumph, not all are as pleased; in fact some - the more spiritually-attuned, perhaps - are downright terrified.

For the line, along with its creators, hides a secret... a secret darker than the tunnels under the Thames, and darker than the stories around the bodies buried there. As dark as the blackest evil of which man is capable.

Bear witness; in the tunnel there is no way out.
WARNING - ADULTS ONLY.