Liu Ran, an urban elite white-collar worker, accidentally searched the Internet for news about the marriage of the person she once loved most. A dusty memory unfolds. During the dark years of school violence, he was like a beam of light illuminating the girl in the abyss. But because of a misunderstanding, the two people accidentally missed each other. When we meet again, things have changed! At this moment, another man broke into her world. He was completely tolerant of everything about her, just like a lover who had been in love for many years. That man possessed a tenderness that Liu Ran couldn't refuse, and Liu Ran gradually fell into despair. She thought it was a love that evolved from a chance encounter, but she didn't know that she was also a ray of light for that person when she was a student. One rainy night when she was young, she gave him a wisp. After he became an adult, he gave her a lifetime of clear sky.