Diego is one of the chiefs of the Spanish Communist Party. On his way from Madrid to Paris, he is arrested at the border for an ID check but manages to get free. When he arrives in Paris, he starts searching for one of his comrade to prevent him from going to Madrid where he could be arrested.

• Sofracima
• Europa Film
• Yves Montand
• Ingrid Thulin
• Geneviève Bujold
• Jean Dasté
• Dominique Rozan
• Jean-François Rémi
• Marie Mergey
• Michel Piccoli