Frank's esteem for an old friend and late socialite proves to be a mistake when her son threatens to publicly reveal who she really was. Also, Jamie asks Erin for help apprehending a perp who shot at him after learning she chose not to send him to prison six months ago; Eddie clashes with her new boss, Sergeant McNichols (Stephanie Kurtzuba); and Danny drags Baez into a case involving a suspicious grieving couple.