Hondo teams up with an old DEA friend, Special Agent Katrina “K.C.” Walsh, on a task force aimed at unmasking the secret leader of a fentanyl drug smuggling ring. Also, Jessica and Michael Plank, president of the Police Commission, begin implementing her new law enforcement community initiatives.

Hondo and Deacon must apply all their SWAT training and skills to evade a gang of armed mercenaries hunting them in the Angeles Mountains following an ambush. Also, Chris oversteps in an attempt to help a female SWAT trainee she suspects isn’t being evaluated fairly.