London 1883; Left on the street to rot, the Doctor finds himself with a young man named Barry, each with no memories of their last actions. With deaths being reported, the Doctor will have to pull himself together to keep humanity safe.
The death of a young girl named Belle McLeish with no obvious cause sparks interest with The Doctor as he is determined to solve the puzzle and understand what happened to her.
When Tom's Nan calls out the spirit world, an uninvited guest invades their lives. Whilst The Doctor is pre-occupied, he calls upon Barry to take up the case. Enter the dark world.
The Doctor and Barry find themselves separated and compromised. A dark plot has begun, one with deadly consequences for the whole Universe. The pair must work quickly to save the day, but time is running out as an old evil begins to stir in the dark.
The Doctor is gone, Nancy and Inara are trapped on Mondas in the hands of the Cybermen, and the Valeyard is only just getting started. With unlikely allies returning to the fold - there is one final chance to save reality.
