Three conmen are assigned to help the Chinese government capture a legendary swindler in Las Vegas and they will not be arrested in return for their aid.

In the early 1970s, the Governor of Hong Kong decided to clean up the police force. The ICAC was established, whose operation branch was headed by Yim. Bong and Unicorn also joined the ICAC. Despite threats of violence and intimidation, they managed to bring about the downfall of the empire of graft.