In New York, Ash Lynx a boy with an perfect appearance and outstanding fighting power has been leading a street gang at the age of 17. One night, Ash is told the word "Banana Fish" from a man shot by his own subordinate. The word was that Griffin, his brother who was pretty crippled, often mentioned. At the same time, he meets Eiji Okumura, a Japanese boy who came as a photographer's assistant.

Ash heads to the agreed place where he shall face Arthur to settle it once and for all. Eiji, who had been left behind, wakes up and is told to head back to Japan by Ash's guys. However, as he finds out that Ash is facing Arthur, despite being stopped, he hurries to where Ash is.

Eiji is shot, and is taken to the hospital. Ash tries to go with him, but it's none other than Blanca who stops him. Blanca tries to take care of Ash's wound, but Ash points a gun at him. Meanwhile, Sing who is feeling guilty for two of his guys shooting Eiji and Ash, makes one important decision...