Based on the true horrors conducted by the Japanese Imperial Army's notorious Unit 731 during World War II. Under the pretense of science, prisoners are used for inhumane and torturous experimentation in developing bacterial and chemical weapons. Ordered to organize and pacify his fellow prisoners, a man witnesses the harrowing corruption and suffering in the camp. The long-suppressed war crimes and horrific experimentation remain one of humanity's darkest moments of depravity.