The heroine, Qin Sayue (played by Baek Jin-hee), is the daughter born to her biological mother Shin Deok-yi (played by Qian Renhe) in an extramarital affair. She was abandoned in a nursery, but she is an optimist who never bows her head in the face of any difficulties. She was born on the same day as the hero Jiang Canbin (played by Yoon Hyun-min) and fell in love with him, triggering a series of joys and sorrows.