Xia Qian is a modern woman. One day, she accidentally catches her boyfriend cheating with her best friend Xun Qie. Her boyfriend beats her, leaving her unconscious. When she wakes up again, she has transmigrated. She marries the Ninth Prince first and falls in love with him later. The two follow their rule of loving each other only after marriage, and spend their lives together as the only two in each other's hearts.
