The richest man in the south of the Yangtze River, the master of the Ling family, went to sea with his wife and left the entire family fortune to his eldest daughter Yu Yan. The huge family business forced her to marry her younger sister to a powerful family to protect the Ling family. However, when she was in danger, her husband went to marry his junior sister and became the eldest wife. A battle for her husband was about to begin.