Li Dayu entered the "Spirit Detective Agency" due to an accidental "haunting" incident, and jointly investigated bizarre and supernatural cases with the cold-faced master Su Qingqing, Huobao Ergou, and the ghost horse girl Ali. This group of "unreliable" people come face-to-face with all kinds of supernatural phenomena: hilariously dealing with ghost pranks, cleverly solving weird mysteries, and climaxing in reverse farce. However, behind the incident, there is a hidden past and the ultimate conspiracy that affects everyone's fate. The three volumes of stories are independent of each other but have undercurrents. From solving the ghosts of daily life to exploring Ali's life experience, the office is involved in the mysterious "spirit world catastrophe", and finally everyone cooperates to uncover the mystery of Lao Gu. Laughing with tears, the final transcendence is not only a ghost, but also a knot in everyone's heart.