The year is 2078 ... A series of temporary anomalies wiped out five billion people, that is, 99% of the world's population. Survivors live in perpetual winter. Scientists find out that the cause of these anomalies is the changes in the past created by the time-traveling organization Winter, whose goal is to immerse the land in permafrost. You go on a dangerous journey on a time machine into the past in the wake of this mysterious one in order to undo the damage and return to Spring.