Chicago P.D.'s Intelligence Unit wields a unique brand of justice to protect the city they love. Led by Detective Sergeant Hank Voight, the team combats the city's most heinous offenses—organized crime, drug trafficking, murders and more. But now it's a new day and age in Chicago. With police under siege and under the microscope, and everyone from the federal government to the city's citizens watching, the question of whether their form of justice can stand up to the law hangs over them.