Don Alvin's quiet life is destroyed when an intruder ambushes he and his family in their home, killing his wife and son. After searching for clues, the detectives discover similar cases that lead them to one powerful common thread. Meanwhile, DDA's Dekker and Rubirosa have to tread carefully in order to get a guilty verdict after Morales' puts their case in jeopardy.

After a high-speed chase, the car is found containing a woman's dead body and no driver, Detectives Morales and Jaruszalski discover the victim's jealous boyfriend, who divulges information that leads them to believe her bookkeeping job was not what it seemed. The trail of the murder investigation uncovers massive corruption in City Hall - and more murder, where Detectives Morales's efficiency as a police officer is on the line.

When successful Hollywood stylist Lily Walker is gunned down while driving, the seemingly random murder sends shockwaves throughout the city. Following leads, the detectives uncover an unlikely twist that forces them to delve deep into Lily's and Detective Morales's pasts for clues to help solve the murder. Meanwhile, DDA's Dekker and Rubirosa must navigate their way through the details in hopes of bringing the real culprit to justice.

When a bank robber hands a teller a photo of her kidnapped son, she quickly hands over the money in order to save his life. Uncovering details, Morales and Jaruszalski soon become suspicious of the kidnapping. When a second bank is robbed with the same motive, a potential suspect comes to the surface and the team finds themselves in a dangerous situation -- and one of their own pays the price. Meanwhile, DDA's Dekker and Rubirosa disagree with DA Hardin's prosecution strategy, so they devise their own game plan so the bank robber is behind bars for good.

When pre-med freshman Beth Garrett is found strangled to death, a mysterious text leads the detectives to a potential suspect. After some investigating at her sorority, the detectives learn that there is more to this mild mannered bookworm than initially meets the eye. Meanwhile, DDA's Dekker and Rubirosa are forced to change their strategy when game-changing evidence is discovered at the last minute.

When a crazed gunman open fires during a rally with State Senator Celeste Kelman, seven innocent people are killed including the Senator. With the help of modern technology, the detectives identify a solid lead and possible motive for the shooting. At the DDA's office, tensions are running high when Dekker and Rubirosa disagree on how to handle the case. Meanwhile, TJ gets himself into a sticky situation as he continues his quest to find his dead partner's killer.

When a destructive wildfire suddenly rips through the hills of Malibu, arson is immediately suspected. Once the blaze is contained, the detectives soon realize that a second fire was intended to cover up a gruesome crime. Meanwhile, DDA’s Dekker and Rubirosa stumble upon some information crucial to the case.

Following a heated argument with his cousin, casino worker George Patrick is found brutally murdered in his hotel bathtub. However, after talking with the victim's girlfriend, they discover that more than one crime has been committed. Meanwhile, DDA's Dekker and Rubirosa reluctantly strike a deal with those involved in order to convict the real mastermind.