When Gaia, the Earth Spirit, makes the ultimate sacrifice to protect humanity from the merger with the Endless World, she leaves Elijah Kane with a system and a mission. As the only one capable of passing through Earth's shield, Elijah must prepare humanity for survival before the barrier collapses. Faced with terrible opponents, ancient civilizations, and endless obstacles, Elijah must overcome fear to guarantee Earth's future in a world where only the strong survive.