After a teenage boy is brutally murdered while spreading the word of his church in Chinatown, Detectives Wysocki and Evers enlist Superintendent Colvin to gain the cooperation of locals. When the unofficial mayor of Chinatown is uncooperative, Alderman Gibbons is called upon to broker a deal that accelerates the investigation. Meanwhile, Teresa's brother-in-law rolls the dice with a shady business deal, and Liam goes even deeper undercover.

The detective duo of Jarek Wysocki and Caleb Evers investigates an international drug dealer whose family is in jeopardy. FBI Division Chief Cuyler intervenes, complicating the high-profile case. While visiting grieving families with Alderman Gibbons, undercover cop Liam Hennessey becomes increasingly vulnerable when he feels the pain of victims. The family drama follows Jarek home when he visits his ex-wife, and wedding bells continue to ring for his fiancé.