Detective Aidan Waits sits on an abandoned hospital ward, watching a mass murderer slowly die. He has just one job: to extract the location of Martin Wick’s final victim before the notorious mass murderer passes away. Wick has spent over a decade in prison, in near-total silence, having confessed to an unspeakable crime that shocked the nation and earned him the name The Sleepwalker.
Wick’s whispered confession will send Waits on a journey into a dark world of lies and revenge on both sides of the law … but can you ever trust a murderer's dying words?