Therapist Mary Kinsella's life was mundane—until her first session with Jackson Shepherd. He confesses to committing horrible acts of torture and murder, in what Mary believes are lucid fantasies as metaphors for his anger. Then one night, Jackson sends her a picture of a fresh, dead body. Against her better judgement, Mary believes she can still help Jackson. Instead she opens the door to a world of death, chaos, and mayhem. Jackson and his friends are cold and ruthless, but also self-reflective and aware. By the time they are done with Mary, she will either have Nobel Prize winning research, or lethal injection. What will happen in Mary’s own program of Serial Killer Anonymous?