In 2248, an unexplained signal is detected from Mars. An object travels through space at light speed before the signal can be decoded, and Earth's defense systems are put on alert. Eight years later, aliens follow the signal back to the Solar System and attack the human fleet waiting along Neptune's orbit. The war that follows is catastrophic: Neptune is destroyed, Jupiter ignited into a star, and more than half of Earth's continents sink from the resulting geological chaos. Kaoru Yamazaki, lone surviving pilot of the Dino246, may be humanity's last chance against the alien fleet.