en Cuevana 3. Ryoko, a beautiful and renowned chief surgeon at a medical university, begins to groan and claw at her throat after rejecting an advance from Tamura, who is infatuated with her. This is a sign that unless she replenishes her supply of hormones from young men, she will revert to her true form as a 400-year-old woman. The next day, Tamura's body is found...