Based on the investigation, the Independent Commission Against Corruption discovered that the Jockey Club's football betting trader (played by Yin Ziwei) was suspected of illegal activities. While trying to investigate this person, he was killed by a killer (played by Zhou Yimin). As a witness, the Chief Investigation Officer of the ICAC, Luk Chi Lian (played by Louis Koo), was questioned by Inspector Liu Baoqiang (Julian Cheung) of the Crime Unit...