With his stunning combination of beauty, intellect, and brutality, Ash Lynx was raised by the mafia Don, Dino "Papa" Golzine, and trained from a young age to be a remorseless killer. While once used as a mere trophy by Golzine, Ash now leads his own gang at the young age of 17, having been estranged from his former boss. Eiji Okumura, a talented young Japanese photographer, is sent to New York to assist with a report on society's underbelly, where he meets Ash, the leader of a teenage gang. Despite their vastly different backgrounds, Eiji becomes enamored with Ash, and Ash is equally intrigued by Eiji's unique way of life. However, this version of New York is a dark and dangerous place, plagued by a string of murders linked by the mysterious phrase "Banana Fish". Ash, Eiji, and their allies must work together to uncover the truth behind "Banana Fish", its origins, and how to stop it from triggering the collapse of their world.