Street Fighter Alpha The Animation, released in Japan as Street Fighter Zero ZERO ? , and also known as Street Fighter Alpha The Movie, is a 2000 OVA film based on the Street Fighter Alpha fighting games. It was directed by Shigeyasu Yamauchi, with character designs by Yoshihiko Umakoshi. An English adaptation was produced by Manga Entertainment and released in 2001.
Ryu is still contemplating the death of his master, Gouken, while at the same time experiencing trouble with the Dark Hadou , Satsui no Had? , lit. Surge of Murderous Intent , an evil energy which Goukens brother, Akuma, succumbed to a long time ago. While in the city, Ryu fights off a few agents working for Shadaloo, gaining the attention of Interpol agent ChunLi, who does some background research and realizes Ryu is the man who beat Sagat, the Muay Thai Champion, many years ago. Also catching sight of Ryu is aspiring martial artist Sakura, who becomes fascinated with Ryu and vows to track him down and become his student.In Japan, Ryu is approached by a mysterious woman, Rose, who questions him briefly about his hold over the Dark Hadou and reason for fighting. While visiting Goukens grave, Ryu meets his old friend, Ken. They are both approached by a young boy named Shun, who claims that he is Ryus longlost brother. According to Shun, their mother raised Shun in Brazil until her recent death, and she sent Shun to find Ryu before she died. Ken is skeptical, but Ryu decides to take Shun in and notices the boys potential as a fighter.One night Ryu succumbs to the Dark Hadou nearly killing Ken. Fortunately Ken punches him in the stomach. Ryu then returns to normal. Later that night Ken talks to Ryu about his Dark Hadou. Ryu instructs Ken to kill him if hes ever completely possessed by the Dark Hadou. Ken is reluctant at first, but then agrees. ........
Source: Wikipedia