Ghost Hunt chronicles the exploits of Kazuya Shibuya, president of the Shibuya Psychic Research Center (SPR), and Mai Taniyama, a first-year high school student. The narrative opens with Mai and her friends swapping ghost stories, an activity interrupted on two occasions: first by a mysterious "male student," and subsequently by a classmate who cautions them that such tales attract spirits. During a walk, Mai spots the building central to these stories and decides to enter. Just as she reaches for a camera lying in the center of a room, a man stops her and accidentally injures himself. Mai is then compelled to serve as a temporary assistant to this man, an employee of the "male student" hired to investigate the "paranormal" occurrences at the school. Mai dubs this "student" "Naru" due to his narcissistic demeanor. Naru owns the paranormal investigation firm SPR, and Mai eventually secures a part-time position there after helping with the initial case. As Mai grows closer to Naru, she gains insight into herself and her feelings for him. In addition to Shibuya's assistant, Lin, the SPR is also aided by various spirit mediums and exorcists.