Shigeo Kageyama, an eighth-grader dubbed "Mob" due to his psychic abilities, discovered his powers at a young age. But as he realizes the potential dangers associated with them, he suppresses his abilities and only uses them to impress his crush, Tsubomi. However, this tactic soon loses its allure. In search of control over his powers, Mob turns to Arataka Reigen, a swindler posing as a psychic. Taking advantage of Mob's abilities, Reigen uses them for personal gain which leads to Mob's mundane task of exorcising evil spirits. Nevertheless, Mob's power runs deeper than his awareness, and as he continues to use them, he edges closer to an extreme burst of unrestrained emotions and immense potential that is unstoppable. Nothing can prevent this progression.