 After several decades of peace, a mysterious dictator called Thanatos, a human wearing a helmet to conceal his face, with an army of humans converted into cyborgs called Thanors, started The Mega War, which ended with Thanatos taking control of Europe.However one group, "The Centurions of Freedom", led by Commander Richard Julian, succeeded in striking back and defeating Thanatos, who seemed to take refuge in what remained of Glorious City (Earth's first world capital, now mostly destroyed by the meteorite) where a strange black liquid from the meteorite, now called "Dark Torrent" by the Centurions, enabled him to recruit a new army of Thanors out of the survivors still living in the ruins of the city and start a constant skirmish-war against the World Federation.The story begins with a former soldier named Captain Chris Colorado, a sporting, intelligent and world-weary soldier, who is recruited by World Federation Commander Richard Julian, who proceeds to reveal to Chris that he is the son of William-Erwin Krantz, a famous member of the Centurions of Freedom charged to infiltrate Thanatos's army and gather information but went missing and presumed to have defected to the enemy.