Watch the latest full collection of Ironman online - Download | Introduction to the plot and ending of the full collection of Ironman |

Two years ago, Senior Inspector Cheng Hui (played by Lu Liangwei) led his team to encircle and attack a group of ruthless bandits. Cheng Hui was critically injured and hospitalized. After being discharged, he learned that his capable subordinate Joe (played by Nicholas Tse) had already been dispatched to infiltrate the gang of Hong Kong mob boss Spanda (played by Ke Shouliang). Officer Joe was trained exclusively by Cheng Hui. Their relationship was one of both mentor and friend. Cheng Hui held Joe in very high regard, believing him to be an elite police officer with a bright future ahead of him.