Synopsis：Five years ago, under a blood-red moon, hotel waitress Ruth accidentally stepped into the room of Arthur, the Vampire King. Drawn together by an irresistible soulmate bond, they spent a night of passion before Ruth fled at dawn. Now she is a desperate single mother: her half-vampire son, Leo, suffers from a rare photophobia that requires an exorbitant treatment. By chance, Ruth takes a high-paying job at Arthur’s castle, and Arthur immediately recognizes the woman fate tied to him. Still furious over her sudden disappearance years ago, he treats her with ice-cold cruelty, while Ruth endures everything for the sake of her son’s life. When Ruth’s greedy aunt sells Leo to a brutal Exorcism Hall, Arthur finally realizes his own flesh and blood is in mortal danger. He arrives just in time to see Ruth shielding their child with her body and roars, “Who dares lay a hand on my son!” His fury shatters all defenses. From protecting his wife and child against jealous nobles to showering them with boundless love, Arthur proves he will destroy anyone who threatens his family. Their tale closes with a grand wedding and the long-awaited happy ending of a family finally made whole.