After a black prostitute is murdered with the inscription "Respect the Order" attached to her body, Mannion and his team start a deep investigation that leads to a racial criminal who started serial killing African-Americans involved with white people. Meanwhile, Parras sees her father arrested for requesting the services of a prostitute and has to face her own family problems. Temple helps a friend detox from heroin, and Ella investigates a suspicious fire that could promote a heroic police officer but ends up being the reason for his arrest.
 

After a video of Brander arresting a drug addict is made public and turned into an abuse of power issue, the Mayor demands Mannion fire Brander, which he refuses to do since the man was found innocent. Instantly, a major riot breaks out in D.C., with the citizens protesting and attacking the police, demanding that Brander be fired for alleged police brutality. Several police cars are bombed and set on fire, and Nancy rescues an officer from an angry riot. He's badly injured and asks her out when he comes by to pick up his dog. Meanwhile, Temple witnesses his friend Reese die while trying to find the man who shot him. Mannion tries to save Brander, but he turns in his badge when he can no longer live with his guilt. Unfortunately, the mayor taped Mannion's conversation with Brander over the phone and fired him for obstruction of justice. Clive calls Mannion late at night, saying that Ella died unexpectedly.