After his wife tragically dies, a desperate widowed husband finds a service online that can bring her back - but not all is as it seems.
The Doctor and his companion travel across time and space encountering incredible friends and foes.
Waking to find himself alone with a murdered woman, Eddie Carter - a night shift cab driver with a worrying history of sleepwalking - sets out to discover the killer, desperately hoping it isn't him. His investigation takes him deep into London's seedy night-time underworld.
