Mysterious incident at a secret factory! Important documents lost! What is the true identity of the enemy's invisible spy?
Teruyo Asagumo
Reiko
Chieko Sōma
Mitsue Nakahara
Hikaru Hoshi
Tokutaro Iwata
Kumeko Urabe
妻とよ
Tatsuya Ishiguro
Takeo Kawachi
Kanji Koshiba
Kuwamura Ichirō
Kōichi Mizuhara
Akanuma Jūkichi
Keiju Kobayashi
中原精一
