On rainy days, some people say that the sky is crying, while others say that it is the weather for encounters. It is so romantic and full of emotions, and many stories start from here... In a rainy late summer, the lead singer of the music-loving band "Give Me an Explanation" Alan (played by Alan Kuo) met the beautiful college student Yu Jie (played by Han Yujie) at a Hanfu stall in the market. Yu Jie's fresh and refined temperament impressed Alan at first sight, and that breath reminded Alan of the most beautiful regret during his college years - Sharon (played by Vivian Hsu). When the feelings between Alan and Yu Jie gradually sprouted, Alan's band was unhappy because of the decision of the record company. Yu Jie wanted to help share Alan's pressure and troubles, but she was powerless, which caused unhappiness between the two. Alan met Sharon, who has now become a rock queen, at this time. The two met again, and memories emerged, and the feelings between the two quietly arose again... At this time, Alan's friend, the painter Zhou Yile (played by Shi Xiaolong), saw the whole triangle relationship. He has a special feeling for Yu Jie. It turns out that four years ago...