When a suspicious doctor hires him to get to the bottom of his wife's perplexing habits, an aimless drifter finally has a full-time job. Unfortunately, he has no idea that he's signed on to a dead-end enterprise. After spending endless hours spying on the doctor's mysterious spouse, he discovers the root of her troubles: She's not able to enjoy normal sex -- and she might be a bloodthirsty vampire. Hisayasu Sato helms this erotic shocker.