This gripping documentary tells the extraordinary story of Ted Hall, a brilliant young physicist who worked on the Manhattan Project during World War II. Shocked by the destructive potential of the atomic bomb, Hall made the controversial decision to share U.S. nuclear secrets with the Soviet Union in hopes of maintaining global peace. Through intimate interviews with his family and experts, including historian Kai Bird, the film explores Hall's moral struggle, the weight of his actions, and the complex legacy he left behind.