Huai Jin is the crown prince of the capital, Yi is the emperor's son, and Huai Rou is the capital's second princess, its most alluring and charming princess, yet still pure and innocent. At noon, Huai Jin is ordered by the emperor to go to a brothel and capture an assassin, only to see his younger sister there as well. Though furious, he finds himself drawn to her. After spending all these years together, he realizes he is gradually falling in love with Huai Rou. What he doesn't know is that Huai Rou is not his biological sister, and he believes he has committed a terrible sin. After making inquiries through his guard Jing Cheng, Huai Jin learns that Huai Rou is not his biological sister. He respects her wishes and never forces her to do anything. But ever since learning that Huai Rou is not his biological sister, Huai Jin has secretly hidden her away...
Theme: Love
