A horde of evil creatures from the underground devastated mankind 15 years ago, but, thanks to the resilience, endurance, and heroism of a few brave men and women, the attack wasn't successful. The survivors managed to rebuild the community and are slowly, but steadily getting back to normal. However, signs and indications here and there show that the monsters aren't dead and took the time to regroup and return with double force. This is going to be humanity's last stand, the final battle for survival. There's nowhere to run, nowhere to hide. Either the humans eradicate the monsters, or they simply perish.