"Enigma" is a suspenseful three-dimensional animated short film. The short film tells the story of a serial disappearance in Jiangbei, a small city on the fourth line in the north. Ten years later, a traffic accident led to this unsolved case again. For a time, everyone in the small town was in danger. With the emergence of new clues and the establishment of the task force, I believe the truth will soon surface. I would like to use this film to express my high respect for the people's police fighting on the front line.