This is a woman escaping one cage only to walk into a war that needs her to survive it. The Demonslayer Divine Sword isn't a prize she's chasing, it's the only thing that makes her escape real instead of temporary. Six episodes means the show moves like a knife, no filler between the rebellion she fled and the armies colliding around her search.

In a primordial apocalypse, Xihe, a young woman of the Huihua Clan, escapes the violent rebellion tearing through her ancestral homeland. After freeing herself from the grip of the Qiongming Demon Tribe, she sets out in search of the Demonslayer Divine Sword, and her quest sparks the conflict known as the War of the Six Armies. This six-episode ONA special mixes action, adventure and fantasy.