In the hospital room number 217 woke up something terrible . Something lurking inside Brady Hartsfield, a possessed maniac nicknamed Mr. Mercedes Although he is still unable to speak and move, his consciousness is awake. But who is able even for a moment to assume that behind the shocking series of mysterious deaths there is now a helpless criminal? Except that retired cop Bill Hodges, who twice had to deal with Mr. Mercedes . There comes a point when he realizes: Evil, hidden in the depths of the consciousness of this monster, has taken a very special form. How to stop a murderer who has gone beyond the limits of the possible for an ordinary person? .