For more than 30 years, a secret war has exploded at an inter-dimensional portal in Antarctica. Alien troops created the portal in an attempt to invade Earth, but Earth unified and developed a secret elite military force to stop the invasion. The highly advanced fighter Yukikaze contains a sentient computer system that, along with Rei Fukai (who is a member of the Special Air Force and pilot of the Yukikaze), provides the best hope of winning the war. In the third volume of the series, the war is in full swing, with the FAF forces ordered to evacuate, and the JAM getting in their way.