In 2010 a manned probe sent from the Earth to investigate Mars explodes in the Earth atmosphere and fragments which contain a DNA sample of what is thought to be a trace to possible Mars inhabitants falls on Japan.

That causes mutations all over Japan. People who are infected by the "virus" are called the Iseki-jin (relic persons). The AAST is founded, obtaining the cooperation of structure Doctor Hiroshi Hyuga they develop a suit, "Mars", as a trump card against the Iseki-jin.

The carrier of the suit obtains super powers, but only a few people, who are DNA compatible with the suit, are able to wear it. Tairu, the son of the doctor, was the first person able to wear it.

While the fragment which fell on Earth is being transported to a laboratory in the USA to be analyzed the transport gets attacked by the Iseki-jin and now Tairu has to fight and defend it for a final solution in this incident.

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