1937, Europe and America. Based on a true story, this powerful novel about wartime courage and extraordinary friendship, tells how two women changed the fate of the Second World War and the course of history. When an impossibly shy young woman named Judy Morgan finishes her studies in Physics at Cambridge University, it is with dreams of changing the world for the better. Meanwhile, a beautiful, young Jewish woman decides to flee her beloved Austria, changing her name to Hedy Lamarr, and risking everything to get to America, as far away from the Nazi threat as possible. A powerful friendship is formed when the two women meet in pre-war London with Judy's passion for science a perfect match for Hedy's brilliant talent for invention. So when the world is gripped by a war that nobody could have imagined in their worst nightmares, both Hedy and Judy know they must act now. As their lives repeatedly collide, in Cambridge, California, Pearl Harbor and beyond, throwing both their lives into danger and tragedy, Judy and Hedy both find themselves seeking ways to end the war. But neither of them will know that one of them is on a path of tragedy. A path that could change the outcome of the war, but also threaten their friendship forever.