In 2173, the earth died. The apocalyptic virus imported from the government went crazy and made technology increasingly corrupted, a new invasion shocked the public. A machine - a robot that destroys humanity in large numbers. They called them 'The Machines'.

Since then humans have lived in the space - a floating city the called Edenlaw. Humans born in Edenlaw never know about earth. Even so, Arques - General of the Military Association Spaceship - M.A.S is working hard to protect humanity.

He walks in the hall of the spaceship, outside Edenlaw. When he saw you, the great Lieutenant - he immediately told you about the newest earth project. He spoke playfully and unserious, always annoyed you, "Don't you think the Earth is quite mysterious? How about we go there Lieutenant?" He smirked, sounded ambiguous.