Four years have passed since the events of the first series. With Pai mysteriously missing, Yakumo has trained himself into a competent demon fighting warrior as he searches for her. When he finally finds her, living quietly as an average high school student in Tokyo, he's shocked to find that she has no memory of who or what she is. Almost as shocked as she is to have a stranger who for all intents and purposes looks like a wandering lunatic insist his life has been devoted to finding her! But not as shocked as either will be when the forces of darkness bear down on them, and leave them with no choice but to seek out a way to finally end the war that begun hundreds of years earlier, a journey that will take them into the wilds of Tibet and across the paths of treasure seekers, both friend and foe.