Led by Detective Sergeant Hank Voight, Chicago P.D.'s elite Intelligence Unit combats the city's most heinous offenses - organized crime, drug trafficking, high profile murders and more. Determined to protect the city he loves, Voight and the team wield his own unique brand of justice. 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, can their form of justice stand up to the law?