A sip of forbidden blood

(Nathan) a young man in his thirties, his wife (Sol) is attacked by a gang of brutal vampires and is poisoned because she received fatal bites from them, and her only treatment is by withdrawing the poison by means of vampire fangs Where (Nathan) goes to a divination in order to turn him into a vampire to save his wife, but when he returns home, he discovers that it is too late, and after many eras of miserable time, he meets a mysterious girl named (Saya), where many strange situations become between them, and (Nathan) tries to appreciate It is possible to hide his truth from her and keep her away from him as much as possible. What will happen to him in the future? Will he be able to complete his life and return as a human being and love again, or will he end up as a bloodthirsty serial killer devoid of human feelings and compassion?