Whose youth has no regrets, and my regrets are related to you. Mo Xingxing (Qiu Tian)'s family was shattered after her mother passed away in a "heroic act". After that, she had to face her father's alcoholism, rejection by classmates, and mental illness. Fortunately, I spent a beautiful and comfortable youthful time in the company of "Little Sun" Mi Sha (Bao Shangen) and warm senior Lu Li (Huang Minghao). However, young people's worries are always accompanied by bitterness. Inferiority and sensitivity push away love and protection. The long line of destiny that is gradually clarified also hints at the separation of youth. At the end of the story, is it only the hourglass that remembers the time we forgot...