Do You Remember the Promise?
In an attempt to save Riku, Saya jumps off the train. After being in the blizzard Saya soon passes out. She awakens to find Haji at her side, but she isn't sure if this is a dream or not. Now Saya relives her past with Haji back in a 1920s Russia.
Aired 04/02/2006EP 17 - Do You Remember the Promise?

Blood+
Saya Otonashi, a seemingly normal high school student, suffers from amnesia and she can't remember the past year of her life. One day, after a man appears and gives her a katana sword, her destiny begins to be revealed.
Soon she finds herself fighting the latest threat to humanity - Chiropteran monsters, ravenous immortal creatures that can change their form, disguising themselves as human beings. They feed off blood and hide themselves within the human world. An organization known as the Red Shield has been waging a private war to wipe them out and now the struggle has grown. Saya's journey for the truth has begun.
(Source: Sony Pictures Home Entertainment)