A century ago, the benevolent King Phelios and the Vampire King Duzell engaged in a life-threatening duel. Although Phelios defeated Duzell, he was killed in the process. Now, Duzell has been reincarnated as a kyawl, a catlike creature, to seek revenge on Phelios's reincarnation. He is adopted by Princess Ishtar, one of Phelios's descendants. With Ishtar's help, Duzell now begins his quest for revenge!