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.

When Superintendent Colvin calls upon Detectives Wysocki and Evers to locate a drug supplier who sent the son of an influential couple into a drug-induced coma, they uncover a more elaborate murder case. As the evidence stacks up, a downtown club where rich men and pretty women mix becomes the focal point of the case. Meanwhile, Teresa has her eyes set on securing funding to buy the department new radios.

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.