A anti drug officer, a third rate Wise Guy, and a high class butt kisser all grew up in Sau Mau Ping. During a drug sweep, the police officer's testimony sent his friend to prison for manslaughter but learned himself a promotion. The wise guy relies on his boss Brother Lik to rise up the ranks but hooks up with Brother Lik's wife Siu Yuk; the butt kisser's boss originally is a drug dealer. The officer uncovers that fact and the butt kisser can only kill the officer. He even has an affair with the officer's wife. The people with similar personalities and interests actually are just as treasonous......