Jake Hoyt, a fresh-faced rookie in the Los Angeles Police Department, gets a chance to join the elite narcotics squad headed up by 13-year veteran Detective Sergeant Alonzo Harris. Jake is to prove himself during a one-day ride-along. As the day wears on, it becomes increasingly clear that Detective Harris has blurred the line between right and wrong to an alarming degree, enforcing his own code of ethics and street justice. Eventually, Hoyt begins...

Working-class suburb Los Angeles, 1928. Christine says goodbye to her son, Walter, and departs for work. Arriving home, Christine discovers that Walter is nowhere to be found. Christine launches a desperate search for her son. Then, a boy claiming to be Christine's son appears out of thin air. Knowing the boy is not hers, Christine invites the child to stay in her home. Christine cannot accept the injustice being pushed upon her and continues to challenge...

Even as a hardened cop, things have never been tougher for Detective Vic Mackey. In this season, he must deal with a vicious, gang-related slaughter with no leads, the desperate attempts of an Internal Affairs detective to discredit him, and the looming threat of forced retirement. To top it all, he's obsessed with finding the killer of a valued Strike Team member and friend. Meanwhile, Shane hooks up with the Armenian mob and becomes a dangerous...