When she was only seven, Zhuo Yifeng witnessed both of her parents die in a car accident. The extreme trauma causes her to suffer from selective amnesia as she completely blocks out her past experience. Zhuo Yifeng's parents leaves her under the care of their friend Su Zijian whose young son Su Muyun is two years younger. Assuming a new identity, Su Nianfeng grows up alongside her younger brother Su Muyun except their relationship is less than friendly. Su Muyun is a legendary name at school while Su Nianfeng is someone easily ignored. During her third year, Su Nianfeng who had no goals in life becomes determined to apply for her medical school because of her good friend Yue Diyin. Yue Diyin is her close confidante. He is warm as the sunshine but suffers from a strange disease.

A car accident is the reason why Lu Miao suddenly has a new older brother, Jiang Hao Yue. Lu Miao practices various martial arts and becomes the female knight to Jiang Hao Yue, the fallen prince. Similarly, Jiang Hao Yue stands by Lu Miao to guard her in his own way. For Lu Miao, Jiang Hao Yue is the moonlight that she has spent her entire youth chasing after, but the moon gets its light from the sun. Without her knowing, she became the sun that illuminates Jiang Hao Yue's whole world. As Lu Miao enters high school and makes new friends, she gradually realizes that her feelings for Jiang Hao Yue go beyond that of siblings. Shi Che's arrival brings upon a strong sense of unease for Jiang Hao Yue. Soon enough, the brother and sisterly love evolves into young love.

It follows a pair of school sweethearts who part ways and meet again in a story about never giving up on love and bravely chasing after your dreams. Zhou Xiao is a big fan of detective novels. Zhao Fanzhou is a student of forensic science who is talented in the field. The two fall into a sweet romance, yet their story ends in a heartbreak when Zhao Fanzhou breaks up with Zhou Xiao. One day, they meet again.