
Chicago P.D.'s Intelligence Unit, led by Sgt. Hank Voight, investigates the city's most formidable offenses -- drug trafficking, organized crime, high-profile murders and other large-scale felonies. The squad -- made up of Voight, Trudy Platt, Kim Burgess, Adam Ruzek, Kevin Atwater, Jay Halstead and Hailey Upton -- is committed to protecting the city and seeking truth, but in the midst of a changing criminal justice system, the team struggles to maintain peace in the community. Voight must learn to adapt to a shifting sociopolitical climate and embrace new tactics to crack down on crime in the city he loves.

Intelligence searches for the dealer who caused multiple overdoses and is connected to Roman's missing sister; the case becomes a homicide investigation when they find the dealer's dead body.

Cook works with a confidential informant for the first time in a robbery-murder case with links to a star college athlete.

A homeless man's murder leads Intelligence to a criminal who has evaded capture for years; Rojas has a troubling experience with a young mentally ill man.

Ruzek witnesses a tragic accident on an icy bridge, leading Intelligence into a dark, sinister case involving sex trafficking.