民国初年，苏宅发生了一件骇人听闻的凶杀案。苏家的未来的女婿李浩天被人发现横死在屋内，然而苏家小姐语蝶却不知所踪。在此之前，留学归来的苏家小姐一直反对这场被封建礼教所束缚的婚姻。作为证人，丫鬟小柔、商人岳以寒、小偷梁三都曾被老爷唤去审问，但他们都怀着利己的目的，竭力维护自己，提供了美化自己、使得事实真相各不相同的证词。

In an early year of the Republic of China, a shocking murder case happened in Su's house. Li Tianhao, the future son in law of House Su was found dead in the house yet Yu Die, the daughter of House Su was missing. Before that, Yu Die who studied abroad and returned was always opposing this feudal marriage. Xiao Rou the servant girl, Yue Yihan the merchant, Liang San the thief all were summoned by the master of House Su for interrogation. They tried to speak for themselves with different beneficial purpose, making the testimony different from each other.