Plot
When an ancient hieroglyphic manuscript is discovered in a prehistoric cave, it soon wreaks havoc on all of humanity. Because in this manuscript lies the secret to awakening Yonggary, the largest dinosaur ever discovered by man. The paleontologist who uncovered the manuscript and his assistant are left with no choice but to decipher the code and destroy the monster before he can annihilate the world. But when Professor Campbell who is only interested in seeking fame and fortune steals the manuscript, the fate of the world is in danger. He decodes enough information to find Yonggary's burial site and he eagerly begins to excavate the site. Despite the efforts of Dr. Hughes who had been missing for years to stop Campbell, the digging goes on. Campbell's assistant Holly, unable to stand Campbell's greed and the mysterious death of workers, leaves her job and joins Hughes in his quest to decipher the codes. But when they arrive at the site to stop Campbell, they see the strange green light emitting from an external world and striking the fossil unleashing the wrath of Yonggary unto the earth. Decoding a part of the ancient hieroglyphics, Dr. Hughes and Holly successfully attacked Yonggary who surrenders and turns to be friendly towards citizens. Failed in manipulating Yonggary, the external world sends a much larger monster to the earth.
