Adapted from Okamoto Kidou's novel, the movie delves into a legend tied to a barren land near Mt. Chausu in Tochigi Prefecture. This area, emitting lethal gases like hydrogen sulfide and sulfur dioxide since the Heian era, has claimed lives of creatures and humans. The tale narrates how a fox spirit in China, disguised as a bewitching woman, wreaked havoc in the kingdom, later arriving in Japan as Tamamo to ensnare the emperor, resulting in a tragic end. As the fox spirit met her demise, she cursed her slayers, morphing into a toxic stone known as Sesshoseki at the infamous cursed location.