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.

Deacon’s second job working private security at a high-profile boxing match places the SWAT team in the middle of a kidnapping case when a prize fighter’s wife is abducted. Also, Hondo’s young charge, Darryl, becomes frustrated with his lack of paternal rights regarding his infant son, and Tan prepares to introduce his critical mother to his girlfriend, Bonnie.

Hondo and the SWAT team race to save Buck, their former unit leader, when he goes off grid and they fear he plans to harm himself. Flashbacks reveal the search for Buck, which coincides with one of the team’s most brutal missions, as each team member receives counseling and discusses the untold mental and emotional difficulties inherent to working in SWAT.