In the 1930s, Shanghai socialite Su Wenli, who had been studying in Europe for many years, returned to Shanghai from Paris and was invited to have a lunch at Ma Minlan's house the next day. However, Ma Minlan's husband Hu Yunlang fell and died in the bathroom that morning. Detective Luo Qiuheng of the police station judged that Hu Yunlang died of arsenic poisoning, so he took away the maid Xiao Taozidiao
In the 1930s, Shanghai socialite Su Wenli, who had been studying in Europe for many years, returned to Shanghai from Paris and was invited to have a lunch at Ma Minlan's house the next day. However, Ma Minlan's husband Hu Yunlang fell and died in the bathroom that morning. Detective Luo Qiuheng of the police station judged that Hu Yunlang died of arsenic poisoning, so he took away the maid Xiao Taozidiao