Mike Sweeney has moved his family to Durham County after his partner was killed. His new neighbor, Ray Prager, who is his old nemesis from high school. Sadie is trying to fit in at school, while wanting to be like her father and dealing with the illness of her mother. Ray Jr. wants to be something that his father doesn't approve of.

Mike Sweeney finds it more and more difficult to hide a painful secret. Ray Prager crosses paths with a serial killer and another woman dies.

Detective Sweeney comes under suspicion of police brutality. Meanwhile a new case keeps him busy while he struggles to help Sadie prepare for the coming trial.

Doctor Verrity tries to protect her son Mark from her husband and tries to deal with the death of their daughter.

Audrey begins a relationship with another doctor and her not-yet ended relationship with Mike may cost her life.

New revelations into Bonnie's death are made as the investigation continues and both parents become suspects. Mike tries to stay professional while Pen draws him deeper into her web, and begins to behaves erratically and dangerously.

Sadie's credibility becomes an issue when she is accused by boys from school, which may hurt her at Ray's trial.

Ray Jr. learns what made his father so unstable and gets news from his mother.

Things come to a head for everyone in Durham County.

Mike tries to convince his daughter that he did not murder Lissie; Pen tries to convince Mike that she did not drown her daughter; Ray tries to convince Pen that he is not a murderer.

Ray Jr. and Sadie butt heads over Rays trial. Audrey tries to reconnect her family. Tom tries to continue the investigations despite Mike and Glenns efforts to cover themselves.

Jonathan awaits the return of his son from his potentially murderess wife.

Some will cry and some will die in the shocking season finale.