World War II rages on in the European and Pacific fronts. Troy, 'Tank', Connors, an American soldier serving in France is severely wounded. He is discharged from the military and returns home to North Carolina to rehabilitate. Back home he and his young wife must somehow put their lives back together. His life is again turned upside down when he accepts a job at an unknown government town with no name or address in the mountains of New Mexico. There, he joins an elite group of scientists working on a top secret government program, the Manhattan Project, building the first atomic bomb. The twists and turns mount as Tank, at one point, is wrongly accused of international espionage. Tank becomes a hunted man. He has few allies on his side. In the climax scene it takes a daring move to save himself.