Two ships are destroyed by a beam of light in the Sargasso Sea, and one is invaded by strange looking 'lizard men'. The U.S. government asks Dr. Benton Quest to investigate. He is accompanied by his son Jonny and Race Bannon. Race has been assigned by the U.S. to protect the Quests, particularly Jonny, since anyone wanting a hold over Dr. Quest might choose to harm or kidnap the boy. Jonny and Race discover that a foreign power is using the area to conduct laser experiments with intent to blow up a U.S. rocket headed to the Moon.
—Bill Koenig