Kadono village's shrine maiden has a guardian every generation. During Edo period, guardian Jinta confronts a demon foretelling a future Demon God's rise tied to their era. His quest to prevent this spans centuries.

In the Edo period, there was a shrine maiden called "Itsukihime" in the mountain village of Kadono. Jinta, a young man who acts as the shrine maiden's guardian despite being a stranger, encounters a mysterious demon who speaks of the far future in the forest where he went to defeat it. From Edo to the Heisei era, this huge Japanese fantasy series follows a demon man who travels through time while continuously questioning the meaning of wielding a sword.—Crunchyroll News