You play as a soldier of the space spacial forces which was sent to planet Mars. After he attacked the officer which gave an order to shoot the peaceful people, this was his last task. He is imprisoned while his comrades are solving the strange issue on Phobos. The main character escapes from prison and sets off to find his detachment he lost the connection with. Soon the main character learns that the gates of Phobos were broken by hellish beasts which eat the personnel and turn people into zombies. All he can do is to find the survived ones from his detachment and to get out of this hell.