France, 1937.

The nation is torn between left and right, as the Cagoule—a secretive, terrorist group inspired by the Ku Klux Klan—plots to overthrow the Republic. Only one man stands in their way.

Antoine, a devout Catholic and war hero, despises communists and pacifists, whom he blames for his brother's death during the army mutinies of 1917. When the French secret service blackmails him over his role in suppressing the mutiny, he is forced into the shadowy world of espionage.

From colonial Indochina to the heart of France, Antoine risks everything to defend the Republic from threats on both extremes. Betrayed by his handlers and constantly under threat of exposure, he leads a life of danger and doubt. His deep-rooted patriotism remains, but as the lines between duty and morality blur, he begins to question what it truly means...