References ghost stories of old Japan on demon folklore; the story of Tsuna Watanabe battling a demon and severing his arm, and the story of a brother and sister from a forgotten village committing incest as a means of supporting each other. This is the cinematic world Shunya Ito wanted to create for this installment of the Scorpion series.
Shunya Ito's final film of the initial trilogy, and was scripted as the finale of the Scorpion series.