
Daniel "Hondo" Harrelson, a Los Angeles S.W.A.T. lieutenant, is assigned to lead a highly skilled unit in the community where he grew up. Torn between loyalty to the streets, where the cops are sometimes the enemy, and allegiance to his brothers in blue, he strategically straddles the two worlds. Hondo encourages his team to rely on communication and respect over force and aggression, but when a crisis erupts, these unflinching men and women are prepared to put their tactical training to the test.
In Mexico, Hondo teams up with a local cop for a dangerous rescue mission, only to find himself with a target on his back; in Los Angeles, Hicks considers disbanding the team for good.
When a robbery crew holds up the iconic downtown Los Angeles library, the team discovers that stolen architectural drawings could lead to a major threat against the city; the squad is surprised by the arrival of a new leader.
A tragic mission leads each member of the team to contend with their emotional distress in varied ways.
Mumford returns to work and investigates a 15-year-old cold case that holds a personal connection and leads to the discovery of a dangerous drug ring; Hondo is suspicious of Leroy's motives.