Chen Qiuye, an ordinary supermarket clerk, originally lived an ordinary life, but one day he fell into a bad life because of the intervention of Li Yanliang, a high school classmate he had not seen for many years. During this period, due to Li Yanliang's various strange behaviors, police officer Wei Wei was also passively involved. Coincidentally, Wei Wei was also a high school classmate and friend of the two of them. So, like a butterfly effect, things intensified. Gradually, more than ten years ago, the death of another high school classmate Zheng Zhengluo was revealed again. This made Weiwei doubt the cause of Zheng Zhengluo's death, and he intended to investigate secretly. Unexpectedly, after further understanding, the suspect in the incident pointed directly at Chen Qiuye, and Weiwei was deeply shocked. After hesitation, maybe for the sake of the police career, or for the sake of his friends Zheng Zhengluo or Chen Qiuye, Weiwei decided to thoroughly find out the truth of the matter. As a result, this dusty past incident once again brought together several classmates who had not seen each other for many years. They "reunite" with their adult selves in the past, and this will be a confrontation between humanity that is hard to tell.
