Human space exploration has entered a new era. On an alien planet, a human-like life form, the Nemesis, was discovered along with valuable resources, and an exchange between the two sides began. At first, the Nemesis were seen as peaceful beings, and it seemed that Earth would enter a new era by coexisting with them. However, the true intention of the Nemesis was to seize Earth's resources and dominate humanity. They infiltrated Earth in a cunning manner, hiding in various parts of the city and launching attacks at unexpected moments. Nemesis had advanced weaponry and powerful biological weapons. Humanity was powerless to resist, and major cities fell quickly. In this crisis, a small group of survivors formed the Special Forces unit Vega and began to fight against Nemesis. Through repeated battles, Vega reveals the shocking truth behind Nemesis' invasion. The purpose of Nemesis was not just to plunder resources. They had a plan to destroy Earth's environment and create a new species by injecting their genes into humanity. Upon learning of this, Vega launched a daring operation. And after a fierce battle, they managed to raid Nemesis' base and eliminate their leader. However, Nemesis' invasion is still ongoing, and Vega prepares for the final battle with the fate of humanity at stake.