Xu Zhi, a poor young girl, secretly falls in love with her classmate, Xie Ran. After saving her lunch money for a whole year to buy him a birthday present, she unexpectedly witnesses him publicly rejecting and humiliating her. Soon afterward, her mother is diagnosed with a serious illness, and both her parents pass away. Overwhelmed by depression and grief, Xu Zhi leaves her hometown. Eight years later, they reunite at a class reunion. Xie Ran has spent years searching for her, and his rejection back then was nothing more than a boy's jealous denial of his true feelings. Determined to win her heart, Xie Ran stays by her side and protects her every step of the way. Through their shared pain, the two find healing and redemption in each other and eventually discover the warmth of life.