Stephen's body, dug up from the grave, is transported on a train ride with his two guardians, Tom and Mac, to an unknown destination: a seemingly bottomless abyss where he finds all his memories and emotions coming back to him. His body is shattered but his mind remains intact.
In the abyss the devil is salvaging souls to place them within living subjects. Anna, Stephen's daughter, a journalist with a young family who lives a mundane life in Oxfordshire, becomes distressed following her father's funeral. She starts hearing her father's voice within her mind and as the voice grows stronger, she embarks on a journey that has far reaching consequences. Is Anna possessed, or is this a descent into schizophrenia?