Shortly after being released from prison, a man who proclaimed his innocence is found murdered. The victim's case is reopened and the squad works hard to solve a seventeen-year old murder. To the surprise of Raydor, Rusty confesses the reason behind his recent suspicious activity.

The violent murder of an alleged rapist gives the squad the emotional task of questioning possible suspects. Meanwhile, Rusty begins to question his mother’s motives as he catches her in a lie.

The LAPD finds itself in a precarious situation during an investigation into the disappearances of a string of young girls from a popular nightclub, leading to a turf battle between The Major Crimes division and the Special Operations Bureau. Fritz Howard remains on the mend from poor health, while Rusty’s mom continues to struggle with the law and her sobriety.

A surrogate adoption gets complicated, leaving one person dead and a lot of people searching for answers. The Major Crimes division gets their hands dirty as they explore LA's underground water system. Sharon works to make Rusty officially part of her family, while he struggles to tell his biological mother about the upcoming adoption.

A young woman and her 3-year-old son are shot to death while driving through gang territory in the wrong colored car, and the gun used in the murder is quickly connected to the most troubling series of unsolved homicides in LAPD history. As Captain Sharon Raydor and the rest of her division attempt to solve the mystery, Amy Sykes begins an uneasy alliance with a disgraced former LAPD detective with a novel theory and a corrupt past.

After another victim is discovered, Sharon turns her attention back to former LAPD Det. Mark Hickman. Fritz and his team attempt to help the LAPD show up in force at Tamika's funeral.

Information pours in about past victims; Lt. Cooper and Amy Sykes are caught in an unexpected gun fight; Sharon makes her way toward the truth.

The murder of a Sex Crimes detective leads Major Crimes into the world of pornography; Rusty's biological mother returns with some surprising news.

The city's tourist industry is threatened by an English journalist when a pair of British tourists are attacked on their second honeymoon in Venice Beach; Rusty's biological mother tries to make peace with him.

Lts. Andy Flynn and Mike Tao delve into the mysterious overdose of a young Hollywood star and the trail of emotional destruction he left in his wake, while Rusty finally comes to a conclusion about how to handle the pregnancy of his biological mother.