On the shore of Youzu Lake on a plateau 1,300 meters above sea level, in the air factory run by Dr. Akazawa, six employees have disappeared mysteriously in the past three years. Whenever the westerly wind blows, someone disappears, which frightens the employees. On a night when the westerly wind roared, the factory owner's wife Sueko also mysteriously disappeared. At the same time, Murao Rokuzo, who was covered in blood, was captured by the patrol police. During the investigation, the police found many suspicious things, and some people put forward the shocking hypothesis of using balloons to disperse human powder to dispose of the bodies. Just as the mystery was gradually revealed, Dr. Akazawa was attacked by a "ghost" again, and his life and death were uncertain. What secrets are hidden behind this series of events? Who is the murderer?
