In the season two premiere, detectives Charlie Crews and Dani Reese are on the hunt for a serial killer when three numbered trunks containing suffocated bodies are found scattered across Los Angeles. With their new boss New York transfer Captain Kevin Tidwell pressuring them to get answers, Crews and Reese race to find a connection between the murders before the killer strikes again. Meanwhile, Ted and Crews attempt to track down the daughter, the lone survivor, of the family Crews was wrongly convicted of killing.
Charlie Crews and Dani Reese investigate the death of a family man who is found beaten and bound to a chair at the bottom of an empty pool. Captain Tidwell is convinced the murder was an act of gang violence and sends the detectives on assignment. After interviewing the victim’s daughters and two gang members, Crews and Reese’s only clues are an underground party circuit, a bottle of steroids, and a myth about a man only known as Monster. Meanwhile, Ted gets an unexpected visit from Dani’s father who is determined to find out what information Crews has on him and consequently has a request of Ted. Crews also enlists the help of his ex-wife Jennifer to reach out to Rachel , the lone survivor of the murdered family Crews was wrongly convicted of killing.
Crews and Reese are baffled when the body of a cancer research scientist is found frozen solid; Crews resolves to prove that Jack Reese was involved in his incarceration; Ted asks Crews to be a reference for a business school interview.
Crews and Reese race against the clock to find the killer when a student acting as a corrections officer in a university's prison experiment ends up dead; Crews obsesses over a recording he got from a wiretap he placed on Reese.
When a college student is found crushed to death in a wrecking yard, the probe leads Crews and Reese to a complex online love triangle; Crews continues his investigation into Jack Reese by hunting for the officers seen in his latest clue.
Crews and Reese must track down a killer who escaped from prison after an earthquake hit Los Angeles.
A woman is found in a pool of blood sitting at a table set with a romantic dinner for two; Rachel and Crews realize they share a common bond.
Crews and Reese must track down the body of a murder victim and a killer when a murder takes place in one of the largest malls in America on one of the biggest shopping days of the year.
Crews and Reese discover that a dead elementary teacher was a woman who exclusively dated cops, and that the killer could be one of their own; Crews and Jennifer address their complex relationship.
When a sheriff’s deputy is found murdered on an Indian reservation, Crews and Reese find themselves in the middle of a turf war between Tribal police and the county sheriff’s department. The detectives learn the victim was not well-liked on the reservation and the opening of a new profitable casino may have led to the deputy’s demise. Crews attends a fundraiser thrown by Mickey Rayborn, one of the individuals Crews believes was involved in the conspiracy against him.
A food bank delivery man is found buried up to his neck in a backyard. Crews disregards the FBI's warning and confronts Mickey Rayborn about his role in the conspiracy that put Crews in jail.
Crews's father, Charles Crews, Sr., shows up at his son's doorstep to try to mend fences. Crews and Reese investigate the death of three Russians; Reese falls into old habits.
Charlie Crews and Dani Reese try to narrow down the list of suspects when a retired NASA pilot is shot mid-flight; Crews tries to remember who shot him.
A lead singer of a heavy metal cover band is suffocated to death; Crews discovers that his father's wedding has been called off.
A con-man is found dead with his mouth full of money in a house without a roof; Crews has a confrontation that sheds some light on the conspiracy against him.
Reese receives an offer to join an FBI organized crime task force, leaving Crews and Stark to partner up. The former partners work on a case of a philandering financial adviser who was murdered and discover a case of corporate and political corruption.
Crews and Stark experience the world of extreme corporate power while investigating the stabbing death of a soldier killed while on leave in Los Angeles.
Jane Seever (Gabrielle Union) is assigned as Crews' new partner while Reese is away. Seever and Crews investigate when a court reporter is clubbed to death.
A co-worker is suspected of murder when Crews and Seever investigate the death of a coroner. They must work fast to find out if the coroner is guilty, or there will be a chance that future cases would become compromised. Elsewhere, Ted tries to work things out with his daughter.
The detectives look into a politician's murder. The victim had been working on a banning of handguns which would cost gun companies millions of dollars. Elsewhere, Crews looks into the new FBI duties of Reese.