In the economically developed eastern province of Guangdong, Luoyuan County is a county seat with the lowest public security status, and the flood tide of the era of sweeping and eradicating evil has engulfed it. The young criminal policeman Wu Jian encountered the obstruction of the underworld forces on the way to investigate a shooting case, and the evidence he handed back to the police force disappeared. He could not clear the suspicion, only Wen Luyang resolutely chose to believe in Wu Jian and invited him to cooperate Task Force work. Wen Luyang, who doesn't play cards according to the routine, and the upright guy Wu Jian, who is thick and thin, have formed a pair of case-solving combinations with different styles.

Adapted from Zheng Zhi's novel "Victim in Me", Nobody Knows tells the story of a ten-year-long gloomy past of several adolescents. Teenage Qin Li got boycotted and teased at school because his father had committed robbery homicide. Yet, the transfer student, Huang Shu, together with his friends Wang Di and Feng Xuejiao, stood firmly by his side, and the four of them formed a solid friendship. However, the things that happened as they grew up kept challenging their relationship. To support each other or to betray? What would they choose to do?