In the fictional Gothic modern ancient city of New Ardenne, Ian, the Alpha heir to the wolf tribe, sneaks into the black market to investigate the disappearance of his tribe, and meets Xavier, a vampire executive. During the assassination, Xavier blocked a silver bullet for Ian and was seriously injured. The wolf blood accidentally awakened the ancient blood curse that bound the two people. In order to investigate the conspiracy of the two families, he had to pretend to be lovers. Along the way, the two tore through the power-seizing and sacrificial plan of the wolf elder Marcus and the vampire queen Seraphina, and their best friend Damien became a victim. In the end, they sealed the Blood Moon Ancient God with the symbiosis of the two races, ending a century of racial hatred and creating a new world of equality ruled by the two kings of wolves and vampires.
