Momodu Gondo finds himself under interrogation, while a detective in a neighboring county tracks a series of drug overdoses to Baltimore.
As a new officer, Jenkins learns shocking truths about police work, Rayam reveals information about the Gun Trace Task Force, and Suiter is tasked with a new homicide case.
In spite of many complaints, Hersl is assigned to the GTTF, Jensen wiretaps Gondo's calls, and Jenkins takes Suiter with him on a raid.
A fatal high-speed chase prompts Jenkins to act fast, and former officer Maurice Ward reveals how Jenkins has remained unscathed as supervisor of GTTF, while the Freddie Gray protests rock the entire city.
Erika, Sieracki and U.S. Attorney Leo Wise are getting ready to charge the officers of the GTTF. Suiter senses mistrust from the community while working on a homicide case. Steele and Davis ask for help from the new mayor.
Following the GTTF arrests, Suiter is worried about his grand jury subpoena, Jenkins' crimes are exposed, and Davis fights over consent decree funding.