During World War II, Baron Victor von Frankenstein was scarred by his Nazi captors, and now plans to recreate the legendary Monster that his ancestor had originally created. To raise money to purchase an atomic reactor to complete his experiments, he allows an American television crew to film a show at his German castle. His servant, Shuter, discovers von Frankenstein's hidden laboratory. After hypnotizing him, the Baron kills Shuter and transfers his brain into the Monster's skull. After the reactor arrives, von Frankenstein brings the Monster to life, but it is blind.
After two members of the television crew are murdered, von Frankenstein's old friend, Wilhelm Gottfried, suspects the truth. He too becomes a victim and his eyes are placed into the Monster's skull, giving it sight. The star of the show is then lured by the Monster, but its brain reverts to normal and it attacks von Frankenstein instead. As they struggle in the laboratory, atomic steam is released, destroying the Monster and its creator.