19世纪30年代的上海滩,私人侦探郑皓东受同乡周海平律师之请,找寻富商林振江死后下落不明的遗产。郑皓东、周海平和从天津找回来的林振江的孙女儿林惠芸、郑皓东的助手张福根一行驱车来到市郊偏僻的林公馆,林振江的私人医生高力文接待了郑皓东一行。晚餐时周海平借机公布林振江的遗嘱,高力文的助手吴祥生拍死了一只苍蝇。用过晚餐,张福根昏昏入睡,周海平带着酒 In the 1830s, on the beach of Shanghai, private detective Zheng Haodong was asked by a lawyer named by Zhou Haiping, an immigrant, to find the unaccounted legacy of the businessman Lin Zhenjiang after his death. Zheng Haodong, Zhou Haiping and Lin Huijun’s granddaughter Lin Hui-jien and Zheng Haodong’s aide, Zhang Fu-gen, who came back from Tianjin, drove to the remote Lin mansion in the suburbs. Gao Linwen, a private doctor from Lin Zhenjiang, hosted Zheng Haodong and his party. At dinner Zhou Haiping took the opportunity to announce the will of Lin Zhenjiang, and Gao Xiangwen’s assistant Wu Xiangsheng shot a fly. Used dinner, Zhang Fugen sleepy, Zhou Haiping with wine