All tragedies begin with the disillusionment of first love. In 1985, a pair of high school friends Sheng Hao and Dong-sik had a crush on the pure girl Mingxi at the same time, and they decided to bet on who they liked in Mingxi's heart. Who knows, the next day tragedy occurred-Mingxi was raped and killed, presented in front of everyone is a cold body. The police went out and launched an inquiry in the village. finally, the suspicious eyes focused on Dong-sik's abnormal brother Kyung-sik. In 1991, Sheng Hao, already a college student, was locked up in the training center for participating in the student movement, where he met Ching-sik, who was serving a sentence, and brought back memories of the past. Sheng Hao has always been bitter about what happened to Mingxi, so he decided to dig up the truth from Kyung-sik. The time goes to 1998. As a result of Kyung-sik's conviction, the fate of the family has changed. Dong-sik's sister Jeong-hee was killed after she made a living selling laughter in Seoul. As the prosecutor of the case, Sheng Hao intervened and met Dong-sik again. What puzzles Sheng Hao is that whenever he encounters an emergency, there will be the figure of Dongzhi, and these parties are inextricably linked with him. Sheng Hao was suddenly full of doubts.