A gifted high school student, Paul Stephens, becomes intrigued by Dr. John Mathewson, a scientist working at a nearby high-security research lab. Paul learns that the lab is engaged in secretive nuclear research and manages to steal a small amount of enriched uranium. Using his exceptional skills, he constructs an atomic bomb, intending to showcase it at a national science fair to draw attention to the potential dangers of the government's covert activities. Paul's girlfriend, Jenny Anderman, supports him, although she has reservations about the risks involved.

As the science fair approaches, Dr. Mathewson realizes what Paul has done and attempts to intervene. The situation escalates when federal authorities become aware of the stolen uranium and launch a manhunt for Paul, leading to a tense confrontation. Ethical dilemmas and the seriousness of Paul's actions come to the forefront as all parties grapple with the potential consequences of wielding such dangerous knowledge and power.