It finally happened... and the aliens were out for conquest. Amid a worldwide invasion, a secluded part of the world holds its own against the unwelcome intruders. Flight Lieutenant Nathan Harvey, a helicopter pilot from the Royal New Zealand Air Force is recruited into the CAVDEV, an experimental powered armor unit. He quickly finds himself leading the fight on the front lines against an overwhelming alien force. Can Harvey and his clandestine unit of powered armor drive back the invading forces and secure a foothold for the human race?