Lee Yeon-seo (Shin Hye-sun) was born into a ballet family. Her parents run a well-known ballet troupe, and Lee Yeon-seo is the best dancer in the team. An accident took the lives of Lee Yeon-seo's parents. The responsibility of managing the entire team naturally fell on the young Lee Yeon-seo. In order to help Lee Yeon-seo, her distant aunt Choi Young-ja (Do Ji-yeon) also became an acting manager. Who knew that bad luck would follow one after another, and Lee Yeon-seo was blind. In order to ensure her authority in the dance troupe, Choi Young-ja secretly made things bad, making Lee Yeon-seo unable to undergo corneal replacement surgery for a long time, and three years passed in a flash. Dan (Kim Myung-soo) is an angel who has done something wrong. In order to make up for his mistakes, he accepted a task sent to him by heaven, which is to teach Lee Yeon-seo, who does not know how to love, what love is. In this way, Dan turned into a man named Jin Dan and came to Lee Yeon-seo's side.