The human era is over. One century ago, the planet has suffered a series of cataclysms that has totally wiped out civilizations. Resulting in total glaciation of the Northern hemisphere with temperature down to -70°C (-94 °F). Nine to ten months a year* the formerly named USA are engulfed.. The inhabitants of the subterranean cities called “Mines” wait patiently The Dawn, period during which the surface becomes practicable again. The story of ATE starts up right after Dawn. The doors of The Mines are open, once again, and the story is about to be repeated.