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.
With Brady hospitalized, Hodges and Holly rebuild, opening private investigative agency Finders Keepers. Brady's care falls to Dr. Babineau, an ambitious neurosurgeon, with input from his brilliant wife, Cora.
Hodges struggles with his cases at Finders Keepers, putting him at odds with a concerned Holly. Sadie senses a shift in Brady's medical state and informs Dr. Babineau. Jerome arrives home from Harvard for the summer.
Brady welcomes a visitor from his past. Sensing Holly's growing frustration, Hodges includes her in his unofficial investigation. Cora continues to apply pressure to Babineau.
Hodges is rattled by the death of a hospital staff member. Jerome offers help in Hodges's quest to uncover the truth. Brady works to master the limitations of his newfound ability. Already struggling to cope, Lou suffers additional setbacks.
Eager to prosecute Brady, Montez turns up the heat on Dr. Babineau. Holly feels betrayed when Hodges' meddling threatens the future of Finders Keepers. When violence hits close to home, Montez seeks help from Hodges.
A visit from Lou elicits an unprecedented response from Brady, and Dr. Babineau pushes him to communicate. Holly begins to come around to Hodges' thinking about Brady. Armed with new intel, Hodges reaches out to Babineau and Cora
Hodges and Donna look toward a new future. Jerome contemplates his place in the world. Under pressure from Cora and Vitalta, Babineau performs brain surgery on Brady. Montez and Hodges effort to get Brady transferred out of Mercy General.
After Hodges suffers an attack, Ida, Holly, and Jerome rally around him, but Donna is reminded of her deepest fears. As support of Babineau's treatment methods dwindle, Babineau goes over Montez's head.
Babineau divulges the details of Brady's treatment, confirming Hodges' worst fears. As news about Brady spreads, Hodges faces intense scrutiny, and Babineau and Cora find themselves in jeopardy.