Trapped in a cage and left for dead, Adam Harding narrowly survives his enforced captivity. Fast forward three years and the peaceful towns of Truscombe and Tewkesbury are shaken by the appearance of bodies bearing shackle marks. Fear ripples through the community.

With the police resources stretched thin, seasoned investigators Sean and Saskia are called to help, soon realizing they are up against a twisted and methodical killer. But the arrival of Sean's newly separated friend strains the partnership, causing him to become increasingly distracted, while Saskia feels pushed aside.

As the body count rises, clues lead to a local therapist and a succession of unnerving emails from a depraved killer. Will Sean and Saskia unmask the murderer before it's too late, or will they become the next targets in this deadly game of cat and mouse? Journey to the darkest corners of the human mind in this chilling psychological mystery with a killer twist.