When FBI Agent Zack Stewart is killed, Agent John Ripley takes over the three cases he was working on, hoping one will lead to his killer. The first involves gangster Joe Walpo and Ripley finds his hideout through Joe's girl friend, Connie Anderson. Joe is killed but it is established he was 400 miles away when Stewart was murdered. The next involves a car-theft gang which Ripley breaks up by using one of the gang, Vince Angelino and his wife Julie. The last case involves Kate Martell, the victim of an extortionist who threatens to kidnap her child unless she pays him $10,000这两位老者的级别单看他们的保卫工作就可窥一二，不知何时广场外围已经站满了士兵，主席台的前沿也是警戒上两排战士，全都荷枪实弹，主席台上更是有几名黑衣人左右环顾，似乎一有不妥他们就马上会出击，只是有一名黑衣人太不庄重了，竟然抱着那名假劳模又颠又笑。