Three years after the victory on a dying Earth. In 2024, humanity won the battle against the unknown invaders Primers that lasted for two years. The Primers have left and the silence returned to the Earth. However, the population was reduced to 10%. Civilization was on the brink of collapsing. And those who survived to continue their efforts to recover. Three years have passed, in 2027. Humanity faced another problem. The Primers left many aliens (Colonists) on Earth. They formed a group and occupied the cities to survive and settled on Earth. Humans and aliens constantly fighting with each other. And through the continuous battle, the two races grew tired of each other. And the remaining threats. There was an even more serious problem. The invaders continued to breed on Earth. The invaders formed a nest underground and its ruins continue to increase. And their numbers have already overwhelmed humanity. Humanity had to keep fighting so that the invaders would not rule the Earth.