He fell into Cuiwei Mountain for no reason and was adopted by his master. Acquire a skill and become as beautiful as a fairy. When she was twelve years old, she was ordered by her teacher to go down the mountain. Who knew that when she came down from the mountain, she would encounter the calamity of her life... She thought she was a mortal, but how did she know that she was not even a demon? Then who was she? What will be the fate of her and him?