Evil Shinma - shape-shifting monsters and vampires - roam the Earth on a mission to unleash their darkness upon the human race. Miyu was born a Vampire Princess, charged with the responsibility of banishing Shinma from the Earth. Stranded in the twilight between human and demon, she has the power to offer humans the gift of eternal happiness with one bite, yet is herself, destined for perpetual solitude. Sharing a dark journey through the weaknesses of the human heart with her only companion, Lava, once an evil Shinma and now her devoted guardian, Miyu lives an endless quest as both the hunter and the hunted.