In the 1990s, in an ancient quadrangle courtyard, Xie Yujin, who had lost her husband many years ago, lived with her children. In the quiet depths of the night, a woman's hysterical cry for help came from the room of her eldest son, Erhei. It turned out that her daughter-in-law, Chen Xiaona, had a nightmare. She dreamt that her husband was holding a knife and fiercely demanding a divorce.