29-year-old Calum Vallejo, dubbed as the Holy Hound of Death for his precision in killing Fabukage-supernatural creatures that use dark magic to inflict harm-is sent by his tyrannical grandfather on a mission to retrieve the pelt of the Hadansmuto, the strongest Fabukage, in order to break the deadly curse he is born with. Along the way, he meets 24-year-old Ciara Dela Vega, a cafe owner and server slash healer who uses her dark magic to heal people and starts questioning everything his grandfather taught him. If that isn't enough, an impending war between Fabukage and the others is on the horizon and he finds himself in the middle of it. Will he be able to stand on his own and decide for his future, or will he remain stuck in the shadow of his grandfather?