M.D. Geist is the fiercest member of a second generation of bio-mechanical genetically enhanced super soldiers, a line of military experiments to create the ultimate soldier knows as MDS - Most Dangerous Soldiers. We follow M.D. Geist's service in the regular army on the planet Jerra against the Nexrum army. However he is considered by his military creators to be far too dangerous to live and is imprisoned in an orbital satellite. Unfortunately this satellite crashlands on the planet releasing M.D. Geist. He eventually finds himself the leader of a group of bandits after he kills their boss in a fight. After rescuing a tank of regular army troops from a Nexrum strike team, M.D. Geist joins them in a mission to stop a malfunctioning doomsday device, 'Death Force', at their own base that will spread an army of 1 million robots, designed to destroy all humans, over Jerra to exterminate all life. During the mission M.D. Geist's true intentions are revealed.

The original MDS, M.D. Krauser, has the last remnants of humans in a fortress in the desert where he is like a god to them. When M.D. Geist's presence is finally realized. M.D. Krauser will stop at nothing to stop M.D. Geist. The regular army and the Nexrum forces decide to collaborate to destroy the 'Death Force' with an atomic weapon but M.D. Geist has plans of his own. The two soldiers clash and old scores are put to rest in the sequel.