Luna, a boy from Iru, is suffering from a spinal cord injury and is slowly becoming paralyzed. Black Jack is called in to perform the operation at the behest of a seemingly inhuman mother who was forcing the boy to get up and walk every night, further injuring him. Black Jack discovers later that the mother had been acting so because she realized the house was under surveillance by the military of the country, which had already executed her husband for speaking against the war.