The movie sees the return of Heartless, Iron Fist, Hunter and Cold Blood, four detectives who dedicate their unique and special skills to the service of Master Zhuge in solving crimes and apprehending powerful criminals.
After The Four 2, Ruthless left, Cold blood (Deng Chao) is on the trail of catching the Death God, he went back to 六扇门, as “四大名捕” is falling apart. At this point, the Palace was in great turmoil. Rather than be trapped in the Palace, Emperor Huizong (Su), insisted on a tour, but was assassinated or missing. 冷血、铁手（邹兆龙 饰）、追命 join forces, as a big conspiracy that has been hidden for a long time, will emerge in the world of martial arts. “四大名捕” will engage in battle till life and death.
