The year is 2073. A hostile alien race has arrived on earth, after crossing countless star systems, with the aim of taking over the planet. Initially taken by surprise, humanity managed to react and organize a resistance that made it possible to fend off various enemy attacks. However, this was not enough to repel the alien invader who is now about to carry out his plans for conquest. Only one last brave hero is left to fight. The entire human species is now counting on him to defeat the enemy and regain their freedom.