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.

The kind and tolerant grandma (played by Hui Yinghong) reunites with her granddaughter (played by Liu Haocun) who was accidentally lost twelve years ago. The grandfather and grandson have gone from being estranged to relying on each other.

When he accidentally found that the oil thief was the driver who caused his younger brother to become disabled, an accident involved him in dispute with oil thieves. He bravely faced it, became a hero in the fight against oil theft.