In a world where angels, demons and vampires are each other's sworn enemies, Cassius had been 'lucky' enough to be born as the next king of the weakest clan of all, the vampires. Seeing his people suffering everyday made him vulnerable, desperate to get some help. For that, he decided to sign a contract with the mysteriously enthralling King of the demons, in other words, the devil who was suspiciously too nice for Cassius's liking. The deal was to help the demons end the great archangel, who had been rumored as the worst person in existence. But there's a little twist to that. Because the devil and the archangel had 'something' to do with each other, and now Cassius was caught in the middle, his presence fueling an entity he never thought would be possible. A love triangle, but the worst thing was that.. Cassius wasn't in the middle.