Officer John Cooper, who has recently recovered from back surgery, returns to duty. He meets his new partner, Officer Jessica Tang, a tough and disciplined cop with her own set of baggage from working the streets. Lydia, whose new partner is Ruben Robinson, can't seem to escape helping a former CI who won't stay in safety.
Ben, Sammy, and Dewey chase an armed man into an elementary school, where they are joined by Ben bumping heads with an intense street cop named Clyde. The three officers try to subdue the suspect while keeping an eye on the schoolchildren.
Meanwhile, Lydia is called to help a former CI, now known as a dangerous criminal. She must navigate the complexities of her relationship with Clyde and work with him to keep their new partners safe.
As the day goes on, the team continues to face challenges, from tense negotiations with rival police agencies to unexpected threats from within their ranks. But with each obstacle, they come closer together, proving that even in the most challenging situations, teamwork is key to success.