In the final phase of their demon exorcist training, sisters Mikoto and Takeru reach Ayagami village alongside Yamato, whose sealed inner spirit poses an escalating threat. Their mother Hatsune once contained the entity, yet only the supreme spiritual force of the Haramiko can achieve a lasting seal. As the sisters confront this ultimate challenge, they demonstrate that no personal cost is too high in service of their duty. Their resolve turns the village into the stage for a decisive confrontation between light and lingering darkness.