Marie-Chantal travels by train to her cousin's place to spend a winter holiday, when a stranger entrusts her with false jewels that contain a virus powerful enough to destroy all humankind.
Marie Laforêt
as Marie-Chantal
Francisco Rabal
as Paco Castillo
Serge Reggiani
as Ivanov
Charles Denner
as Johnson
Stéphane Audran
as Olga
Akim Tamiroff
as Prof. Lambaré / Dr. Kha
Roger Hanin
as Bruno Kerrien
Antonio Passalia
as Sparafucile
Pierre-François Moro
as Hubert de Ronsac
Robert Burnier
as A Swiss Gentleman
Gilles Chusseau
as Gregor
Eugenio Di Petra
as
