A failed science experiment gives a librarian the ability to turn into a gaseous substance. He goes on to rob banks to fund his dancer girlfriend's career, killing those who interfere. Now Tokyo's most wanted criminal, can authorities stop him?

Tatsuya Mihashi
as Detective Okamoto

Kaoru Yachigusa
as Fujichiyo Kasuga

Yoshio Tsuchiya
as Mr. Mizuno

Keiko Sata
as Reporter Kyoko

Bokuzen Hidari
as Jiya

Yoshibumi Tajima
as Detective Inspector

Hisaya Ito
as Police Scientist

Tatsuo Matsumura
as Editor Ikeda

Fuyuki Murakami
as Dr. Sano

Yoshio Kosugi
as Mean Detective