Zhao Xudong, a blaster technician, survives a mine explosion that kills four workers. Suspecting foul play, his investigation leads to more murders, making him a suspect. He must unravel the truth to clear his name.

Zhao Xudong is a blaster technician. When an explosion happens in the mine and kills four workers, Zhao survives. He suspects that the explosion is not an accident, and when he investigates further, two miners and the mine owner are murdered. As the body count increases, Zhao becomes the prime suspect, and he has to clear his own name.