Thirty years ago, a man of Miao descent asked Tse Kong to keep a statue called the "Old Cave" on his behalf, telling him that the statue can allow him to become wealthy. Tse Kong soon makes a fortune, and became a tycoon in Shanghai, dominating both the police and underworld. However, Tse becomes intoxicated with Gu poison. Tse's friend Hao Cheung-ching unscrupulously informs the secret of the "Old Cave" to the Japanese. Tse's second son Seung-wai, who is slightly neurotic, falls in love with female spy Yip Ching-wah. Although Seung-wai knows that Ching-wah is getting close to him to steal the "Old Cave", he does not debunk her.