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.

Skip and Eiji were taken away by Frederick Arthur's gangs. Ash is caught by Marvin, a subordinate of Golzine who has joined hands with Arthur, when he rushed out to save the two who were taken away. The three tries to escape with Ash's tact. However, Shorter shows up and a brawl ensues. Ash pursues Marvin who is running away, but when he enters a room, an unexpected sight unfolds before him.

Ash is sent to prison. The journalist Max who was in the same room was asked to look after Ash by Charlie, a detective. However, a young and good-looking Ash is attacked by Garvey, a prisoner who was under the patronage of Golzine. But in the medical office he was carried into, he finds out that Max has been carrying out research on "Banana Fish"...

Ash demands to have the hostages released, in exchange for sparing Golzine's life. But that's when Foxx betrays Golzine. Cain, Sing, and Blanca quickly take action to save the hostages together with Ash. Meanwhile, Eiji, who's in the hospital, decides to finally head back to Japan, but just can't seem to get Ash off of his mind...