Sonata of the dead

Four months after the harrowing events of Dust and Desire, Joel Sorrell is recovering from his injuries. However, a new, gruesome case pulls him back into the darkness: a body found beheaded and sealed behind a wall in Muswell Hill, surrounded by bloodstained text. This is the third such murder by a killer known as The Hack, and the investigation takes a chilling turn when it may connect to his daughter's disappearance.