The game plot is taking place in the post-apocalyptic era. Five centuries ago all the human beings who survived the end of the world went to live in the underground. They created the highly developed system of tunnels and infrastructure. The new underearth population get the oxygen and other vital elements thanks to the so called VESTA energy, the state-of-the-art secret technology. That’s why all the game characters can’t survive without one of the essential game attributes - gas masks.
VESTA is produced on the enormous factory the access to which was restricted centuries ago. And now this life-saving technology can become a cause of the second apocalypse. So, the game characters chosen by the government to complete this mission should discover what went wrong on the VESTA factory.