One year after a cataclysmic event has wiped out most of human civilization, a man struggles for survival. Faced with an insecure, decaying, and hazardous world, he scours a desolated city, searching for his long lost family. Survive the suffocating, murky streets covered in dust. Climb the ruins of the last standing skyscrapers to reach breathable air and find untouched resources. And discover a changed human condition, dangerous armed gangs, and victims in need.