Women in the Night (1948) on Netflix

Plot summary

With Germany defeated and Japan still fighting, an international group of women is kept in a Shanghai building that serves as a hospital and a German officers' club. German authorities seized them at Shanghai University over the death of one of their officers. Frau Thaler is told to dress the women and put them to work entertaining Japanese officers and scientists. Colonel Von Meyer has promised his visitors a cosmic ray generator, a weapon more deadly than the atomic bomb, and Field Marshal Von Runzel arrives with orders against the handover. Yvette Aubert, a French entertainer, volunteers; the American, English, Australian, Russian and Mexican women refuse.