Events take place in a future urban world where mysterious forces and mythology combine. The Miracles appeared out of nowhere. With their arrival came a slew of terrible monsters, ready to inflict havoc and ruin. Espers are people who received divine power from a specific deity after the Miracles appeared in the world. There are two opposing organizations in the world of Grandis, called the Esper Union and Shadow Decree. Due to their different views they frequently clash in combat.