Years ago, journalist Shen Leshui documented the lives of workers at the old Lacheng Brewery. Now, she returns to Lacheng, picking up her camera again to explore those corners forgotten by time. Cao Jun, Tu Chunyan, Qian Yichuan and Cheng Youtian were once the protagonists of her lens, yet their fates have been shaped by the passage of time. Their stories are like riddles sealed by time, and Shen Leshui travels between the past and the present, uncovering these long-forgotten tales.

20 years of perseverance, hot-blooded teenagers finally become the people's hero.

The rape and murder suspect dies in the interrogation room due to being beaten up by the crowd earlier. The three teams responsible for this case are also imprisoned together, while the other suspect is still at large. After being released from prison, the three teams, led by their captain Cheng, track down their whereabouts. They pursue the culprit for twelve years.