Secret agent

The title seems confusing someone asked is she really a princess? Hey guys theis is not about princess in the palace drama,this is about a girl who's identity is a daughter of the leader of assasin. She was adopted by a poor family,become slave and survived. Yuwen yu took her train her and become close to her. But then something happen that she went to the prince yanxun side. She didnt leave him after he lost his family and together they took a revenge but then again she was disappointed  to him. Anyway this is literally the first drama that make me wanna watch cdrama so imagine how good this is specially the figjt scenes.