Eugene, a high school student, initially didn't believe in ghosts because his grandmother's promise of returning as a spirit after death remained unfulfilled from his childhood.

He meets Mogari, a descendant of spiritual mediums, who attends a regular high school but is required by his family to conduct exorcisms in Kamakura, a place known for spirits gathering.

Despite being unable to see spirits, Eugene is moved by Mogari's personality and, although skeptical about spirits, wants to trust Mogari. Eventually, he joins "Phantom Busters," a club specializing in exorcisms.