The Northern Kingdom is shrouded in numerous mysteries, particularly surrounding the enigmatic heir who is universally recognized for his handsome and sharp features, even though his face is often concealed behind a black mask.

Prince Xue Lang, the 13th prince from the Eastern Kingdom, famous for its 12 beauties, Xue Lang’s sisters. He has been cast aside by his family due to his unique appearance - heterochromia, a condition characterized by having two differently colored eyes, which his family considers a disgrace.

One day, while wandering through the forest near the eastern border, Xue Lang stumbled upon an injured and unconscious man, bearing a large wound on his side.