In a city that is neither small nor big... There's a mountain that people avoid. The undeveloped mountain isn't protected with a green belt... Nor is it a site of environmental conservation... The avoided, prohibited forest... With the dismal atmosphere and the rumors that whisper about the spirits led it to be called... Spirit Mountain. On the mountain is a house... A famed house of mediums that show off their long, glorious heritage. Hence, it was once called Medium Mountain. But once a long time ago... They said a Ninetails lived there... And was known as the Fox Mountain. But 20 years later... A dark aura has covered this isolated place.
Mokyeong, a human who traverses Spirit Mountain for medicinal herbs every month, climbs up the mountain, where he meets Banya, in his fox form. The two talk about a mysterious male who has been reincarnated. Banya tells Mokyeong that he will leave the Medium Scroll and travel to the Celestial Sphere.