Synopsis：Urban security officer Alex Han is brutally killed by vampires on patrol, but his father’s restless soul activates the Sun Seal and sends Alex back to the year 1650. Reborn in the past, he uses knowledge from the future—repeating crossbows, gliders, and financial foresight—to become a legendary demon hunter. He rescues the aunt who was meant to be sacrificed, snaps Dracula’s neck, and drives three silver bolts through the skull of a thousand‑year Vampire Lord. Yet victory carries a curse: all vampiric hunger pours into him, the golden sun seal turns into a silver moon crest, and an ancient “Night King” awakens in the distant East. The empire’s mighty emperor is revealed as the Vampire Lord’s vessel. Alex leads an army of half‑bloods to storm the capital and personally breaks the emperor’s neck. In the final battle, he uses a silver key to lock the Night King—now a colossal being of pure fear—back into eternal darkness. The curse is shattered, and humans and vampires stand together in the sunlight. As they part, warrior Selena rides east and says, “When you return to your own time, I will be there waiting for you.”