2000 years ago, the Elemental King ended the First Elemental War by banishing the Elemental Demons. Inspired by his sacrifice, the Gods bestow upon humanity the gift of "elemental aura" and the Elemental Task Force is formed to protect humanity from elemental threats. By 2018, over 99% of humanity has an "aura type", which is the ability harness aura into a unique elemental power.