In present day Okinawa, a young amnesiac girl named Saya combats vicious, shape-shifting vampires. Her adoptive family and friends help her track down their source and uncover her past.In present day Okinawa, a young amnesiac girl named Saya combats vicious, shape-shifting vampires. Her adoptive family and friends help her track down their source and uncover her past.In present day Okinawa, a young amnesiac girl named Saya combats vicious, shape-shifting vampires. Her adoptive family and friends help her track down their source and uncover her past.