She is an orphan who has fallen from a scholarly family. In order to save her family, she was forced to enter the Shanghai Vanity Fair and became his nominal fiancée. He is a young marshal with a lot of troops, and he only married her to hide the white moonlight in his heart. A marriage that started as a transaction has evolved into a bone-crushing entanglement amidst the turmoil and family strife. When the guns were pointed at each other, she realized that his step-by-step calculation contained a deep affection that she had never seen through.