In the 21st century, the powerful nations of the Earth have launched into fierce competition over natural resources found on the newly discovered planet Gradioras. But each time a probe is launched to extract resources from Gradioras, monsters appear and threaten life on Earth. As Baeklim University professor Heinrich Park studies the monsters, he discovers that the monsters are receiving orders from someone through artificial brains which have been implanted in each monster. Professor Park develops a gamma ray in order to defeat the monsters, but Spectre, an international crime syndicate, has other plans. Directed by Yu-soo Yong, the film is a representative work from Korea's animation boom period.

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