Two years after retiring, former homicide detective Bill Hodges is still haunted by his last case. When the demented culprit begins to torment Hodges, he embarks on a crusade to bring the killer to justice.

As Hodges struggles to maintain his sanity, both Pete and Ida take notice. Deborah worries about Brady, who gives her a window into his latest work. Hodges connects with Olivia Trelawney's sister Janey, who hires him as a private detective.

Hodges and Janey dig deeper into the circumstances surrounding Olivia's death. Hodges uses Debbie's Blue Umbrella to turns the tables on Brady. Jerome's father intervenes in his relationship with Hodges.

Ida is hurt as Hodges and Janey's relationship intensifies. Lou is disturbed by an interaction with a customer. Deborah takes Brady to the cemetery and the two reflect on their difficult past.

The cat and mouse game between Hodges and Brady escalates. Hodges has an upsetting conversation with Janey's mother. Deborah's drinking almost causes an accident at the Hartsfield home.

Hodges struggles with the past as it concerns his daughter, Allie. As Deb attempts to make a change for the better, Brady interferes. Robi continues pressuring Brady to impress their bosses. Hodges connects with Janey's niece, Holly.

As Hodges helps Janey through a difficult time, their connection deepens. Realizing he still needs their help, Hodges brings Jerome and Holly back into the investigation. Deborah confronts Brady with her concerns.

A critical error puts Brady in the center of a crisis of his own making. Holly and Jerome make a pivotal discovery. After a tragedy sends Hodges reeling, he goes to visit his daughter, Allie.

Jerome and Holly tell Hodges their concerns about the Mercedes Killer. Tensions continue to escalate between Brady and Robi. As details about the investigation emerge, Hodges, Pete, and Izzy close in on their suspect.

When another murder victim is discovered, suspicions about Brady are confirmed. As the police prepare for another massacre, Hodges fears for the safety of those he loves.

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 unexpected death of a hospital staff member. Jerome offers much needed 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.

When a visit from Lou elicits an unprecedented response from Brady, 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.

The community reels from recent news about Brady, and the Mercedes Killer's future lands in the hands of the few people who have survived him.