The song "Dandelion Promise" is the melody at the beginning of the love between Yu Chuxia and Li Xuyao. They have gone through the most beautiful three years of their lives. Their youth seems to never fade away, just like the spring, summer, autumn and winter in their lives keep circulating.
Will youth age? It seems to get old. When Li Xuyao left, Yu Chuxia felt that her youth was beginning to grow old, and she couldn't make up the missing pieces.
However, fate still can't bear that everyone who deserves happiness is alone, so it arranges for An Yulun to stay by Yu Chuxia's side with a secret.
When the gears of time bite one after another, the long-buried secret is finally revealed, allowing Yu Chuxia to regain the youth that has never aged.
Just like the word "early summer", everything is as beautiful as it was at the beginning.