Long, long ago, in the distant past… or was it in the far-off future?

The mighty empire of Yamato exists at peace under the rule of its god incarnate the Mikado.

Oshtor, Mikazuchi, Munechika, and Shunya have been hailed as heroes ever since they repelled an invasion out of long-lost Arva Shulan.

Yet once more, a shadow falls over the nation.
Monster rise in every corner of the land, and disconnected incidents spiral towards one conclusion while old comrades triangulate a response.

As their journey begins anew, they have no way of knowing—what awaits them is sung about only in legends.
Somewhere, white mists still cloud a cradle—but a long, light slumber is about to end.