Ding Shuxue only lives with her mother because her parents divorced. I lived a peaceful life in college every day, but who knew... One time I went to a bar to cover for my friend He Lin, and I met Leng Chen. What was their story before this? They met 7 years ago. But they were separated by a fog. Seven years later, what sparks happened again? In the end, no one knows who was moved first...