The best people on the job never stop looking for ways to do more and be better. For police officer Justin, the objective is joining the force's SWAT team, and he takes a big step by leading a raid with the SWAT officers. Meanwhile, the first responders deal with a rash of scary calls, including a man suffering from amnesia after getting hit by a car, and a woman who fell off a roof. And after a man survives a suicide attempt, Arkady forges a bond with him by sharing the story of her mother's own suicide.

On the tenth anniversary of Hurricane Katrina, everyone in New Orleans and on the Nightwatch recall their experiences with the storm, and reflect upon the significance it still holds in their lives. But amid the remembrances, the city still needs its first responders. And over the course of a busy run of calls for the EMT's, the police SWAT team looks to execute a high-risk raid. The people on the Nightwatch will do anything to protect their city.