Ho Chi-wai (played by Yung Kam-cheong) is a policeman who shoulders the heavy burden of protecting the personal safety of Hong Kong citizens. Although Ho Chi-wai's heart is full of professional honor and sense of responsibility, he has witnessed more and more negative events and watched the reality and ideals deviate further and further, and Ho Chi-wai's inner pursuit has gradually wavered. In an operation, Ho Chi-wai's colleague died in the line of duty. The death of his colleague made Ho Chi-wai determined to join the Flying Tigers. In the arduous training and cruel tests, Ho Chi-wai stood out with courage and wisdom and eventually became a qualified Flying Tigers member. Instructor Huang Dashi (played by Michael Wong) also made Ho Chi-wai firmly believe that his choice was not wrong. Finally, Ho Chi-wai got the opportunity to face the gangsters who had killed his colleagues again. He vowed to catch them all and avenge his colleagues.