A seemingly simple story about a gold tooth saving a man from his coworkers' murder plot in a factory. The truth is revealed, highlighting the dark side of the workplace and the desperation of exploited workers.
Coworkers plot to kill Xiao Zhang, a factory supervisor, by pushing him into a steel furnace.
Xiao Zhang's newly fitted gold tooth prevents the plan from succeeding.
The incident exposes the poor working conditions and exploitation of workers in a black factory.