Six years after the Spore War ended, the international space station Sunflare suddenly lost contact with Earth. With its resources running dangerously low, the station commander had no choice but to take the remaining crew aboard a rocket back to Earth. No one expected that by then, Earth had already been devastated by an unknown plague. The last surviving troops trembled beneath the onslaught of countless "Defiled," while the survivors abandoned the moral principles that made them "human" in order to stay alive. What exactly happened on the first day of the plague, March 11, 2043? Driven to uncover the truth, he was forced down a road from which there was no return.