The opening three minutes are better than most action anime manage in a full season. Ray is an archaeologist who fights like she's trained her whole life to break things, and the OVA never wastes time explaining why, it just drops you into a temple collapse where brains and violence have to work together or she dies. Two episodes is exactly how long this story needs to breathe: one temple, one mystery, one mirror, and a finale that actually resolves instead of setting up a sequel that never comes.
Ray Kazuki is an archaeologist who can fight as well as she can think, and she's about to need both skills. She is studying a newly found legendary temple in a remote corner of the world, carrying an heirloom mirror from her father, a strange artifact that may open a way to a lost civilization. What should be a straightforward dig turns complicated when she crosses paths with Mai and Mami Tachibana, a pair of carefree young girls who seem magnetically drawn to trouble. Trouble arrives in the form of Rig Veda, who wants Ray's mirror for himself. The mirror isn't just a trinket: in Veda's hands, its secrets could lead to disaster. Now Ray must stop him at any cost in this action adventure.