When the Hasidic Grand Rebbe passes away and appoints his youngest son Levi to the office, everyone is shocked moments later when Levi is found murdered. Danny and Mack work on the case with Det. Wolf Landsman, a former Hasid. They discover Levi had a mistress outside of the Hasidic community but after ruling her out as a suspect, they link the rare fox hairs left on Levi’s jacket to his advisor and best friend Lefko. They soon learn Lefko murdered Levi because he was in love with his wife and wanted to punish him for cheating on her. Meanwhile, Jamie arrests a former Mayor’s daughter for smoking pot in public and when her poor attitude in court rears its head, there is nothing Erin or her father can do to help her. Henry reveals to Frank that he had an older brother who died of Leukemia as a baby….