Bold (played by Cheng Kui'an) leads a group of gangsters to rob a South African diamond king and succeeds. They find a middleman, Li Yunfei (played by Chen Huimin), to sell the stolen goods, but during the transaction, they cheat and kill the acquirer. Li Yunfei takes advantage of the chaos and escapes. Due to special circumstances at work, undercover Zhang Lang (played by Zhou Xingchi) and his girlfriend Zhou Wenli (played by Zhou Huimin)...