A series of ghastly murders are being committed. The one similarity in each of the murders is that a strange buzzing sound is always heard right before the murder occurs. Is the killer invisible or possibly some other incredible creature?
Chief Inspector Wakabayashi
Yoshirō Kitahara
Akiko Hayakawa
Junko Kano
Dr. Tsukioka / The Invisible Man
Ryūji Shinagawa
Mieko
Ikuko Mōri
Sugimoto
Jōji Tsurumi
Detective Hayama
Yoshihiro Hamaguchi
Dr. Hayakawa
Shōzō Nanbu
Chief of the Metropolitan Police
Bontarō Miake
Kôkichi Kusunoki / The Human Fly II
Ichirō Izawa
Yamada / The Human Fly I
Shizuo Chūjō
Hajima
Kô Sugita
Director Tada
Tatsuo Hanabu
Fujio Harumoto
Kōichi Itō
Doctor
Teppei Endō
Gen Harada
Plane Passenger (uncredited)
Jirō Tamiya