The world as we know it is gone. A terrible force known as The Scourge has ripped apart the land, boiled the seas and broken even gravity itself. A band of survivors has taken refuge in a mountaintop fortress, the lone safe-haven from the chaotic world below. They constructed a mythic warrior, a stone giant known as The Sentinel, with the power to restore the world so that it can once again sustain life. Centuries pass as the people wait for their hero to return and liberate them, but a boy named Ori refuses to wait any longer.