The dramatic story of how one man was asked to develop a death ray, but discovered radar. This electronic wizardry not only helped win the Battle of Britain, but also brought Allied women for the first time into the front line of battle as they tracked and destroyed Hitler's Luftwaffe. Using detailed color reenactments, archive footage, and interviews, we delve into the world of scientific discovery at MIT's "Radlab", and dive with U.S. submariners as they use radar to defeat the Japanese.