Four British intelligence agents infiltrate the heart of occupied France in this clever World War II cloak-and-dagger thriller. Forged papers pave the way for French soldier James Mason and British spy Hugh Williams to slip into a small French village to gather information on German fortifications. With the help of local Resistance fighters, the British are able to pass along vital defense data back to England. But when a daring visit to Boche headquarters destroys their cover, the agents must run a deadly gauntlet to the sea while invading Allied paratroopers launch an explosive assault on a key Nazi stronghold. Uprav informace o filmu