The game is set in the distant past of the universe, when the Earth was a young planet, and the whole civilization was just beginning to emerge. The first creatures were simple and had no knowledge of how to build a civilization. The development of the planet was threatened by the attack of the alien race, called the Ancient, who came from the distant future.

They were very advanced and had a powerful technology, which they used to attack the young Earth. The planet was surrounded by the walls of a great fortress, and the only hope for the survival of the civilization was the development of a strong military force.

The main task of the player is to build a fortress, use technologies to develop and improve it, and defend the planet against the attack of the enemy.