During the fourth world war also known as the Great Collapse,
Humans began to develop abilities through an energy called aura which is gotten from our life force.
The war had to end on account of this.

Nations formed alliances and decided to use the ability wielders as a form of law enforcement against rogue users.

These Ability wielders were named Exorcists.

Hikaru Kage was born to the lowest exorcist clan in Japan.
His goal is to Establish the Kage clan as the top ranked clan but has to face the other clans' attempts to stop him.