Graus Invasion

The invasion of aliens was unexpected and sudden like a strike of a predator. We were not prepared and couldn't stop them in space or air. Our planet is the last battlefield.

Did you think that we are alone in the galaxy? We are not talking about the whole Universe, but the distant planets that are rounding on the orbit of the visible star can be populated with unknown forms of life. Some of them can be aggressive and have technologies to fly across the space. Someday they can find us. Is this that day?