Psychotherapist Emma-Jane Glass has prioritized work over leisure for far too long. She does whatever it takes to help her clients, and it’s bordering on professional obsession. When she publishes a controversial article about unstable mothers murdering their children, an anonymous letter arrives on her doorstep: I will expose you. Then, I will mutilate you… Wait for me. After she is abducted into the night, Doctor Glass finds herself at the mercy of a dangerous sociopath. But being a relentless doctor of the mind, she feels an urge to help her fragile captor, even if it might shatter her sanity—and her life. It becomes a game of survival, and only one mind can win.