Detective Chief Inspector Paul Cullen of the British Transport Police is back in a brand new mystery and the final part of the Archangel Trilogy.
When a body is discovered on tracks in West London, the hunt for a killer begins.
But who is the victim?
And how does the crime relate to DCI Paul Cullen?
The race to uncover the truth commences.
Meanwhile, Paul Cullen's recent past is about to catch up with him, with potentially deadly consequences.