Six hundred years ago, the humans of Earth migrated to a new star system and established planetary colonies where people could live in harmonious peace. But that peace didn't last. Twenty years ago, Yeonsu Carlos witnessed when tragedy struck on the planet Han and alien ships wiped out thousands of people, leaving the mining colony in ruins. Yeonsu lost his own wife and daughter during the attack. Now, as a captain under the military arm of the Planetary Union Government, Yeonsu pours his soul into leading a force against the Resistance that sprung up after the tragedy of Han. The Resistance that desires to seize power from the Union and send the star system into chaos.