A scientist discovers the formula of a particular resistant steel, and a spy ring from an enemy power sets after him to obtain it.
Peter van Eyck
Kramer / Jack Haskins
Mikaela Wood
Anne Bardot
Klausjürgen Wussow
Johansson / Bonnard
António Vilar
Pierre Genet / Dick
Corny Collins
Jenny Renoir
Letícia Román
Ethel / Ellen Green
