A self-proclaimed exorcist named Arataka Reigen attempts to exorcise an evil spirit, despite only stumbling onto it by accident. The spirit seems annoyed at his attack, which consists of throwing a handful of table salt which actually meant to be purified salt, much to Reigen's shock. Reigen then unleashes his secret weapon: calling in the actual psychic Shigeo Kageyama (a.k.a. "Mob") to banish the spirit for him with his psychokinesis powers. Some time later, Reigen is contracted to rid a mysterious tunnel of evil spirits. Once again, Reigen manages to trick Mob into doing most of the work for him. One of the ghosts, the deceased leader of a biker gang, warns of an even more powerful monster further down the tunnel, and begs the exorcist not to fight it. However, Mob manages to take it down anyway.