
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.

When back-to-back shootings at women's clinics leave two healthcare providers dead, Hondo and the team investigate whether the shootings were politically motivated.

When two students are brutally attacked, 20-Squad contends with a possible honor killing; Hondo and Nichelle have their first parenting dispute while searching for a suitable daycare.

Newcomer Jim Street jeopardizes his spot on Hondo's team; the team searches for a ruthless drug trafficker who is using immigrants as couriers.

After a domestic bomber dies in an explosion, the SWAT team races to find the man's partner before more devices detonate; Hondo reaches out to his former team leader.