When murderous cult member "Baby" Jane Lee Rayburn is found stabbed to death, Detectives Rex Winters and Tomas "TJ" Jaruszalski question multiple suspects, including the cult ringleader Denis Watson and Jane's former cellmate, Maura Dillon. However, the case cuts very close to home for Detective Winters when his wife Lori, a former Detective, is questioned. DDA Dekker and DDA Stanton find themselves facing a trial where the line between suspect and victim is blurred.

When a meth lab in Sylmar explodes, killing two kids, TJ and Winters embark on an odyssey that uncovers a band of radical Muslims hell-bent on bombing LAX.

The investigation of a hit-and-run accident leads to a political minefield.

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.

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 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.