A Russian emigrant sings in a Shanghai nightclub under the assumed name of Kay Murphy. All she dreams of is a peaceful life with her daughter Vera. But this is only a pipe dream as she has been forced by her former lover Ivan to work for a secret criminal organization, "The Black Dragon". Vera, who studies in a Hong Kong boarding-school, knows nothing about her mother's past. When Ivan, who is also Vera's father, resurfaces and blackmails Kay, the young woman is determined to fight back...
| Actor | Role |
|---|---|
 Louis JouvetIvan | Ivan |
 Raymond RouleauFranchon | Franchon |
 Suzanne DesprèsNina | Nina |
 Valéry InkijinoffLee Pang | Lee Pang |
 DorvilleBig-Bill | Big-Bill |
 André AlermeMac Tavish | Mac Tavish |
 Élina LabourdetteVera | Vera |
 Robert ManuelAttacked customer | Attacked customer |
 Mila ParélyCaptain of the girls | Captain of the girls |
| Suzanne DesprèsGoverness Niania | Governess Niania |
 Christl MardaynMrs. Blonski / singer Kay Murphy | Mrs. Blonski / singer Kay Murphy |
 Gabrielle DorziatCollege director | College director |
 Marcel LupoviciBlack Serpent slayer | Black Serpent slayer |
 Gaby AndréFriend of Véra (uncredited) | Friend of Véra (uncredited) |
 Valentine CamaxTraveler (uncredited) | Traveler (uncredited) |
 Janine DarceyStudent of the institution (uncredited) | Student of the institution (uncredited) |