In a near-future society where the war between vampires and humans has ended, hatred still lingers. Raised by a family of vampire hunters despite never being accepted as one of their own, a young man with a rare constitution is given a dangerous mission: infiltrate the household of a surviving high-ranking vampire and steal a treasured heirloom. His unique body, immune to the addictive effects of vampire bites, becomes the key to carrying out the plan.