Yakumo spends four years training to find Pai, only to discover she's forgotten him entirely, and the show makes that sting worse by showing exactly how much he's changed while she stayed frozen. The action doesn't flinch; violence has weight and consequence, not just spectacle. By the end, you realize this is a story about two people trying to become the same version of each other again, and the OVA doesn't pretend there's an easy answer waiting in the Holy Land.
Yakumo has spent four years tracking Pai across the world, driven by an obsession he can't quite name. When he finally locates her, the reunion shatters his expectations: Pai exists, but her memories don't. She's hollow, disconnected from everything that made her who she was. Desperate to restore what's been lost, Yakumo convinces her to journey toward the Holy Land, the legendary birthplace of the Sanjiyan race. It's a place of ancient power and forgotten secrets, where immortal beings guard truths that could reshape their understanding of themselves. The trek becomes increasingly perilous as supernatural forces close in. Enemies emerge from unexpected corners, and Yakumo discovers that Pai's amnesia might not be accidental. Strange rituals, hostile creatures, and landscapes warped by dark magic test their resolve at every turn. As they push deeper into the Holy Land's mysteries, the line between salvation and damnation blurs. Yakumo must confront whether recovering Pai's past will actually save her, or if some doors are meant to stay closed.