When five friends from the same rehab center who celebrate their sobriety together are murdered under similar circumstances, Bishop and Cole are called in to investigate.

In the premiere episode, Bishop and Cole uncover disparate pieces of evidence - a flowering hydrangea plant, a severed human finger with attached compass ring, a cellular phone, a gold locket, and the victim’s body. They then attempt to solve the homicide of a young pharmacist. Meanwhile, Cole struggles with the memories and grief of his own wife’s unsolved murder.

A traditional Chinese businessman is killed, Bishop and Cole must get help from outside the department to solve this crime.

Cole and Bishop try to solve the murder of a boxer who is found dead in an alley following a fight.

A paramedic is killed in front of her boyfriend, a journalist, during a robbery. Bishop and Cole soon find a suspect with a personal vendetta.Cole has to make plans in secret for Bishop's upcoming birthday.

A wife learns posthumously that her husband had been concealing a year-long battle with cancer, which prompts Goldman to recall painful memories of loss and tragedy from his own childhood.

Cole and Bishop try to explore their dating possibilities at work, when they are called to a murder investigation. A man was killed, when he tried to steal a bottle of wine from a restaurant.

A nightclub DJ is murdered brutally, but the investigation of Cole and Bishop uncover even more than just a simple misunderstanding.Meanwhile Bishop's brother is released from prison and needs help to find a job. In the same time Cole works on the case of his murdered wife.