"If I could go back in time, maybe I would change a lot of things, but the only thing that won't change is meeting you, getting to know you, and liking you." After graduating from college, Shen Lin faced various pressures from work and life, and under a combination of circumstances, he found that he had an opportunity to go back to seven years ago. Perhaps by seizing this opportunity, he could complete the regrets of his youth and the joy of his youth.