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A patriotic British stage magician volunteers his illusionist abilities to help battle the Nazis. After proving his potential value to skeptical commanders, he and a few cohorts are sent to North Africa, where British troops are being pounded by Gen. Rommel. He helps halt Rommel's charge through a campaign of deception. He camouflages a key British-occupied harbor by creating a bogus one that bears the brunt of nightly bombing raids; shields troops in the Suez Canal through a system of anti-aircraft searchlights and mirrors that blind Nazi pilots; and camouflages British weaponry and uses props to give the appearance of a stronger fighting force.