During the Anti-Japanese War in Shanghai, the strong-willed Han Shu Ying is forced to marry Xie Bing Yan, a wealthy tycoon from North Jiangsu, as his concubine. She escapes but is soon discovered by Xie Ruo Xue, the eldest lady of the Xie family. After witnessing Xie Bing Yan's death at the hands of the Japanese for refusing to betray his country, Han Shu Ying chooses to stay and protect the family. Amid the chaos of war, Han Shu Ying and Xie Ruo Xue form a deep bond—first as mother and daughter, then as sisters-in-arms—rising together to resist the enemy and fight for their homeland.