Blood+

Blood+, pronounced as "Blood Plus", is an anime series produced by Production I.G and Aniplex and directed by Junichi Fujisaku. The series premiered in Japan on Sony's anime satellite channel, Animax, as well as on terrestrial networks such as MBS, TBS, and RKB on October 8, 2005. The final episode aired on September 23, 2006. Blood+ is licensed for international distribution in several regions through Sony Picture's international arm, Sony Pictures Television International (SPTI).

Blood+ was inspired by the 2000 anime film Blood: The Last Vampire; however, there are only a few allusions and basic elements from the film. Fujisaku has been involved with both works, including acting as the director for Blood+ and writing the novelization of Blood: The Last Vampire.
Plot
Under the care of her adoptive family, Saya Otonashi has been living the life of an anemic and amnesiac, but otherwise ordinary schoolgirl. Saya’s happy life is shattered when she is attacked by a chiropteran, learning that she is the only one who can defeat them.

Armed with her katana, Saya embarks on a journey with her family, allies, and her chevalier, Hagi, to rid the world of chiropteran and rediscover her identity. The course of the journey reveals the background history of the chiropterans and Saya's very deep past, which extends into the mid-19th century.

The series is initially set in present day (September 2005) Okinawa City (Koza), on Okinawa Island, near the US Kadena Air Base. In the course of the series, Saya visits locations across the world, fighting enemy chiropteran and searching for her origins.
from:wikipedia
by:stephy