He is the proud son of heaven in the world, the legitimate son of the Nangong family that has been in the family for more than a hundred years, and the first disciple of the old man Tianji who is the best in the world in martial arts; and she is the fifth "son" of the owner of Feiye Villa. She has been tortured since she was a child, just because her mother was a maid... But one day, she met him, and her life changed...