In Shangai, the "Green Dragon" threatens to kill Herbert Aboody, a rich exporter, unless he pays him 50,000 dollars. One of Aboody's secretaries calls inspector Wens for help. An amazing fact occurs, Wens kills Aboody and then disappears. What is the key to this mystery?
Hélène Perdrière
as Floriane Aboody
Paul Bernard
as Herbert Aboody
Maurice Teynac
as Inspector Wens
Pierre Jourdan
as Steve
Stanislas-André Steeman
as Matriche
Gilberte Clair
as Mona
Krisha Duchesne
as Lydia
Ky Duyen
as Commissioner Whu
Andrews Engelmann
as Zetskaïa
Robert Lussac
as Commissioner Malaise
Lonne Voo
as Lotus
Georgette Anys
as (uncredited)
