In the early 70s, when Hong Kong was under British colonial rule, corruption was as rampant as ever. The majority of the Hong Kong Police Force collaborated with the triads. As king of the corruption empire, Chinese detective sergeant Lak Chui colluded with Cripple Ho, lord of the underworld, and made almost ten billion dollars through bribery. Lawyer Hank Chan despised this kind of illegal acceptance of benefits. He believed this would deprive the general public of their opportunity to fight for their own rights if they could not afford black money. His luck came when Hank met Nash Pak, his old friend who came back from England. Nash admired Hank’s integrity, and hence invited him to join the Independent Commission Against Corruption (ICAC), an anti-corruption organization directly accountable to the Governor of Hong Kong. Hank and Nash selected a team of elites, forming the first team of ICAC investigators, and cracked down hard on the underground laws of Hong Kong. Their first target was Lak Chui and Cripple Ho. After tremendous efforts, initial results were seen. But what followed was a series of counter-attack by Lak Chui and Cripple Ho. The team members of the Commission were being threatened and persecuted. However, Hank's confidence did not falter at these setbacks. He was even more determined to remove these two tigers from the scene. The fight between the righteous and the evil had begun...