In Barcelona, secret agent Antoine Donadieu thwarts the plans of a Nazi scientist.
Jean Marais
as Antoine Donadieu
Marisa Mell
as Frieda
Gérard Tichy
as Matras
Howard Vernon
as Le professeur
Jean Lara
as Pelletier
André Cagnard
as Gouferolles
Léon Zitrone
as Self
José María Caffarel
as Technicien de la police
Carlos Casaravilla
as Varosky
Antonio Casas
as Colonel
Álvaro de Luna
as Hamlet
Fernando Guillén
as Colonel assistant
