Three years ago, there was a modern day city that lived by the sword. It's population believed that their weapon was their soul and thusly guns were never created. One day out of nowhere, the entire population vanished into thin air. Every human, every animal, even every insect, without a single explanation. All that was left behind, was their weapons and the city itself.

Today, the weapons which contained the souls of the populous have begun taking on physical form. Those who are reborn, are brought back to their city without their memories. The city is now surrounded in an invading grey mist and the sky itself is forever covered in grey clouds. Those who venture outside of the city are never seen again.

...This city has become your prison, what's next?