Enemies from a past life catch up with Wolfram.
[Post-Season 3 of the anime series.] New threats are rising in the Demon Kingdom. Contenders to the throne of Dai Shimaron are vying for Yuuri's support, while a supposedly extinct race of dragon riders emerges from the shadows. And yet nothing is more dangerous than the appearance of an enemy who's sworn to take everything Yuuri has.
Wolfram is at the thick of it all, as he slowly regains memories of who he'd been in a previous life. He remembers he'd been murdered - at the hands of a friend, of a lover - and now the killer is back to settle some scores. But there are greater forces at play, leaving Wolfram torn between the past and the present, where he's ultimately left with a harrowing decision to make.