Guangzhou is in a state of political turmoil in the 1930s. Gangsters are on a rampage and opium trading becomes rampant. As they watch the illicit profits from opium trading escalate, the government forms the Anti-Smoking Bureau under the guise of suppressing opium, but the bureau is under the influence of Cheng Long Kwan, the gang's kingpin. His eldest daughter Cheng Kau Mui who is an unscrupulous person soon returns from Shanghai
