Detectives Winters and Jaruszalski track the activities of a tech-savvy group of teenagers who they suspect have escalated from burglary of the rich and famous to murder.

The murder of golfer Kristin Halstead sends Detectives Winters and Jaruszalski to the Mens' professional circuit for leads, only to find them in Chip Jarrow. Trouble comes in the form of an incident between Jarrow and his wife Monica. Which leaves DDAs Dekker and Stanton to filter the chaos into a coherent case they can win.

When a normal quinceañera erupts in violence, leaving multiple people dead, the detectives work quickly to follow a lead. During their search for answers, they find a young boy protecting acres of marijuana and discover he is the only witness that can help the case. As the detectives begin to close in on a suspect, Winters receives a surprise visit at home. Meanwhile, DDA Morales (Alfred Molina) must risk upsetting the Mexican government by prosecuting the guilty, which results in a shocking decision.

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.

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.

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.

When Kim Ho Lee is found dead by a neighbor, the detectives suspect her live-in boyfriend of murder until they stumble upon his dead body. As Winters and Jazuszalski begin digging into Joyner’s past, they learn that he was hired to collect voter signatures in order to put a controversial proposition back on the ballot. However, when surprising details are uncovered, DDA’s Morales and Price find their case in jeopardy and justice hanging in the balance.

When a horrific mass murder occurs at a primarily Hispanic office, the detectives immediately begin investigating the remaining employees, as well as their clients. After arresting a potential suspect, the case comes to a sudden halt when a claim of racial profiling is made against the unlikeliest of sources. DDA’s Dekker and Stanton are forced to navigate through tricky waters in hopes of proving their case.

A birthday party turns into a horrific scene after all of the guests are beaten to death by some uninvited visitors. With several clues left behind, the detectives are led to believe it was drug related. However, when they learn one of the guests escaped it leads them to a shocking discovery about the murders. Meanwhile, DDA’s Morales and Price ask for fellow DDA Dekker’s help to convict the culprit.

When Javier Gomez is found dead at UCLA, the detectives learn that protecting his sister Malia, a star soccer player, may have lead to his murder. After speaking with Malia and her boyfriend Eric Kenter, Winters and Jaruszalski are led on a path to uncover the suspect, only to discover the case taking a surprising turn. With the prosecution losing ground, DDA’s Morales and Price are faced with the difficult task of uncovering the truth.