We are still in Moscow. We are still in the underground. We are still facing new dangers. In the end of the first story, Sergey (protagonist of the predecessor) managed to get out of Moscow's underground. But on his way he took out many of the defense systems of the people, turned them off, broke them and left most of the doors and other openings opened, making it easy for monsters from above to show their destructive power and eliminating the small rest of the civilization in Moscow. You play as one of ten mercenaries put together into a squad by Sergey's uncle, leader of an underground colony. On the way the group gets attacked by a wave of monsters and you lose the squad. Now you are alone in the underground world and you still have your task to do.
