In the last days of World War II, the Japanese occupation of Manchuria has collapsed. As the Chinese move in, the elders of the Japanese settler village of Sakito decide to preserve their honour by killing all the villagers in an act of mass suicide. Only 16-year-old Tatsuru escapes. But Tatsuru's trials have just begun. As she flees, she falls into the hands of human traffickers. She is sold to a wealthy Chinese family, where she becomes Duohe - the clandestine second wife to the only son, and the secret bearer of his children. Against all odds, Duohe forms an unlikely friendship with the first wife Xiaohuan, united by the unshakeable bonds of motherhood and family.