While Platt tries to manage a chaotic desk area, a man struggling to get her attention takes a drastic action and demands that the unit find his missing daughter. At the same time, Commander Fischer informs Voight that Bunny is bringing up new accusations on a case from his past. Lindsay urges her mother to fix the situation. Meanwhile, Antonio is shocked to learn a secret Olinksy has been keeping.

After a botched undercover job, Ruzek is under scrutiny by the new Street Deputy Crowley who will determine his future with the unit. A suspicious person call turns into a murder investigation when Burgess and her temporary partner Price discover the body of a dead man in an SUV. After Mouse identifies the victim as the owner of a security company, the unit soon realizes there might be more to his story. Halstead and Lindsay take a step forward in their relationship.