Danny reunites with Mickey Patrick, his childhood friend and a former criminal, who comes to him for help finding his missing fiancee. Anthony surprises Erin with one last stakeout before her run for District Attorney.

Danny and Baez investigate a case of grand larceny tied to feuding crime families. Frank clashes with Mayor Chase when an influx of immigrants arrive in the city. Erin questions whether her district attorney campaign is compromising her day job.