On her 14th birthday, a tragedy stuck Hye Soo's life after saving someone's life from a car accident. In result, she became blind, making her life worse than it already was. Through this, she befriended with the person whom she saved without knowing what his face looked like since he was trustworthy to her. Several years passed and he left to become an official SM trainee which she did now have any knowledge about. What if, one day she regained her vision back after a surgery and spent her life trying to find her best friend back. Only to fall in love with one of his peers instead.