An obsession born of a fated bond a thousand years ago becomes the tie between them in this life. A wealthy merchant's daughter dies mysteriously on the eve of her wedding, then “comes back to life” seven days later. Her temperament has changed completely: she is incredibly strong, fears sunlight, and claims to be deeply in love with Commander Mo and determined to marry him. Young men around the city are found drained of their lifeblood. The mystics believe a powerful demon is behind the attacks, and their suspicions point straight at Commander Mo, who is rumored to have an ambiguous relationship with the “resurrected bride.” The heroine is ordered to investigate, only to find that the hero seems to indulge or protect the “bride” in some way. She grows even more suspicious that he is working with the demon, or perhaps is the mastermind himself, using it to eliminate his enemies.