In 1937, Nanjing was devastated by the brutal Japanese army, but a church hosted by international friends was temporarily a pure land. Several clergymen took in a group of Jinling female college students hiding in the church, 13 prostitutes on the Qinhuai River who were avoiding the war, and 6 wounded soldiers of the National Army who crawled out of the pile of dead bodies. The story of facing the most brutal massacre in history together, and the result was that the 13 most despicable women became heroes who protected everyone. In this relatively closed space, they faced the most terrible and inhumane massacre in history together, and developed all kinds of wonderful feelings. However, the church was not a permanent pure land, and the Japanese army finally rushed in. The wounded soldiers were killed, and the female college students were about to be abducted and humiliated by the Japanese army. At this moment, these 13 women who were usually regarded as lowly, in front of the invaders' inhumane butcher knives, inspired chivalry: they wore choir robes, carried scissors, and replaced the female students in the church to attend the Japanese Christmas celebration and went to a tragic death appointment.