On the morning of April 30, 1943, off the southwest coast of Spain, a local sardine fisherman made the gruesome discovery of a lifeless body floating in the water. The dead man, who appeared to be a soldier with a black briefcase chained to his waist, was quickly brought ashore and handed over to the authorities. Later, documents found in the attache case revealed top secret plans about a large-scale Allied invasion of Greece and Sardinia. The information eventually landed on the desk of German leader Adolf Hitler, who reacted decisively. However, there was just one problem: The discovery was a fake.