Based on Stephen King’s best-selling Bill Hodges Trilogy, which includes, "Mr. Mercedes", "Finders Keepers" and "End of Watch".
Season 1: Two years ago, a psychopathic killer drove a stolen Mercedes into a crowd, killing 16. The recently-retired detective who headed the unsolved case suddenly begins receiving mysterious messages containing unreleased information and decides to start his own, unofficial investigation.
Season 2: A year after his thwarted attempt to perpetrate a second mass murder in the community of Bridgton, Ohio, Brady Hartsfield remains hospitalized in a vegetative state. Retired Detective Bill Hodges has done his best to move on from his Brady obsession, teaming up with Holly Gibney to open Finders Keepers, a private investigative agency. But when unexplainable occurrences begin to affect hospital staff members attending to Brady, Hodges is nagged by the feeling that Brady is somehow responsible.
The murder of iconic local author John Rothstein devastates Hodges. When unpublished works of Rothstein's are suspected to be stolen from his home, Hodges launches an investigation.
As she is evaluated for mental competency, Lou continues to be haunted by Brady. Morris and Alma hatch a plan to recover their spoils.
Holly visits Lou ahead of her psych evaluation. Jerome accesses Rothstein's records and uncovers an unexpected connection to Ida. Hodges and Montez look into the death of Stan McNair. Morris and Alma are caught in the act.
Alma and Morris zero in on a suspect. Jerome continues to make strides in the Rothstein case. Hodges shares his guilt over Lou's current situation with Ida. Lou's trial officially begins, and she has some suggestions for Finkelstein.
Lou's trial continues in earnest. Bill is called as a hostile witness for the prosecution and complicates matters. Holly and Finkelstein draw closer together whilst Morris closes in on Peter. Alma destroys her incriminating evidence. Both Lou and Bill converse with their respective personal ghosts.
Alma gives Pete a scare and instructs Morris to do the same.Pete revisits the local bookstore. Hodges and Jerome fear for Holly ahead of her taking the stand.Finkelstein tells Lou that she must silence Brady. Holly and Lou deliver powerful testimony.
Jerome discovers a connection between Alma and Rothstein. After an attempt by Morris fails, Alma pays a visit to Second Story Books. Hodges visits the Saubers family and confirms their worst fears about Pete. Lou learns her fate.