
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.

Hondo and Jessica's secret relationship comes to a crossroads when the president of the police commission discovers their affair; Hondo and the team assist with the federal investigation to bring in an undocumented fugitive.

The team goes on the hunt for a serial killer who escaped justice two years prior by faking his death; Hondo worries that the team's former leader is spiraling into depression in the aftermath of being fired from the department.

Hondo's informant friend is killed while seeking information for a joint SWAT and FBI task force; when the FBI task force leader acts erratically, Jessica worries the woman's behavior will endanger the team in the field.

A young heiress is kidnapped for ransom; the team goes on a citywide search to bring her home before she is harmed; the team worries that Mumford is moving too fast when he announces he's getting married for the fourth time.