The disembodied heart of Frankenstein's monster is transported from Nazi Germany to Japan for experimentation during World War II and believed lost when Allied Forces drop the bomb on Hiroshima. Several years later, the mutated monster reappears! But this town isn't big enough for two monsters. The destructive, underground-dwelling Baragon emerges to do battle with Frankenstein to the death! Originally released as Frankenstein vs. Baragon.