In the grim dark future of the 24th century, the harsh, regimented and pragmatic state of Terra has been trapped for what seems like a forever war against robotic machines which were created to end World War Three. Drafted into its superhuman army, the Legion, nineteen year old Zach Harker is paired with the battle hardened "Alpha Squad" or "Team Orca", a team of commandos who are thrown into the most dangerous situations in battle.

As he navigates the brutal world of the human-machine war, Zach finds his virtues and principles put to the test, often having to choose between...