In the wake of World War Three, the brutally pragmatic state of Terra is the last major bastion of human civilisation and its main army is the Legion, comprised of a race of genetically modified superhuman men known as Legionnaires who are currently engaged in a total war with armies of so called "machines", a race of robotic monsters. Amidst this chaos, nineteen year old Zach Harker is pressed into the legion where he fights an uphill battle not only in the name of humanity but in the name of his honour and principles as well. All of which shall be put to the test in this ordeal.