Street reconnects with his estranged foster brother, Nate, to help a joint investigation between SWAT and the Long Beach Police Department when criminals steal a mass arsenal of LAPD assault rifles. Also, Hondo finds himself at odds with his father over the elder man’s declining health, and Luca is overwhelmed when the entire team reconsiders becoming investors in his food truck,

The SWAT team’s task to provide security for a warlord is threatened by assassins determined to take him out before he’s extradited by the International Criminal Court. Also, Hondo’s father, Daniel Sr., tries to make amends to his mother, Charice, Street’s foster brother, Nate, asks for his help with a corrupt boss and Deacon reluctantly explores therapy for his daughter, Lila.

Street is caught between his duty to SWAT and his commitment to his foster brother, Nate when Nate is ensnared in a criminal enterprise that could ruin them both. Also, the SWAT team goes after a ruthless crew that uses deadly force while stealing from card casinos, and Buck approaches Deacon to partner on a private security opportunity.

Hondo and the SWAT team rally to support Street when he puts his life on the line to help his foster brother Nate break away from a drug ring.