In 1937, Manchuria was occupied by Japanese forces. Ku Ping On and a brother-like friend Tin Hau Yi brought her sick mother to Nanjing to search for her father Ku Man Chai, owner of the biggest rice company in Nanjing. She discovered that Hau Yi, whom she considered to be her fiancé, was actually in love with Cheng Yuet Fung, the fourth wife of her father. Afterwards, Poon Sai Cheung, who helped the Japanese, "bought" Ping On.