Cassidy is forced to infiltrate a corrupt precinct whose officers are suspected of raping young women during their shifts.
Munch's retirement party is interrupted by an accusation by a recent rape victim that she has been attacked for a second time.
Serveride is met with unexpected news, as Voight returns.
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Severide pulls out all of the stops in hopes of resolving his problems.
A teen is killed by a bullet during a party and his friend loses his freedom to what he says is a lie.
Identical twins find their mother's dead body in their home, located in a gated community.
Police a lawyer dead and his girlfriend bound in duct tape.
Halstead goes undercover at a corrupt treatment center for troubled young girls.
Intelligence investigates a home explosion with no witnesses and a victim burned beyond recognition.
When a desperate father comes looking for a hitman to take care of his daughter's murderer, her case is re-opened by the intelligence team.