As a 26-year-old mature woman, Lin Miaomiao looks back on her experiences of the past 20 years from her perspective. During the review process, she sees herself as a toddler, as a child, and even as a young adult. The sadness and joy during this period caused ripples in her heart. But the perspective of best friend Liu Tingting and Lin Miaomiao are completely different. Can Lin Miaomiao, who thinks he understands Liu Tingting, accept her so-called friendship? And can Lin Miaomiao finally be with her childhood sweetheart, whom she has always had a crush on?