A letter from his brother-in-law Takashi Yabe, a junior high school teacher, tells of his discovery of an ancient tomb built to seal an evil spirit (yōkai).

Yabe's son, Masao, searches for his father in the school during summer vacation and sees a returned Reiko at the schoolhouse, seemingly seducing his gardening classmate Kono.

The nephew and uncle pair initially suspects the suspicious janitor, Watanabe, who had tried to keep people away from the schoolhouse, but soon realize that the disembodied singing head of Reiko is at fault.

He believes Hiruko is at fault for the recent incidents, and sets out to learn the spells to open and close the way into the burial mound sanctum.

Watanabe, who had earlier cut the power lines to the schoolhouse, attacks the pair, though Masao successfully takes his gun in the struggle.

Tatsuhiko also bore the scars of dead men's heads on his back, and somehow sealed the gate 60 years ago; he swore Watanabe to guard the schoolhouse after his death to prevent a recurrence of the tragedy.

The pair believe they have finished, but Reiko had somehow snuck onto Hieda's back, and she uses the opportunity to grab onto his face and influence him to open the gate again using memories of his dead wife.