One year has passed since Kazuma Kiryu, "yakuza with the heart of gold", defeated his biggest adversary. Despite this victory, Kazuma has lost more than he had ever imagined. But events from the past continue to haunt him. A man he had admired so much, who was like a father to him, has revealed a terrible secret before he died. It's time for Kazuma to solve the mystery once and for all. Caught in the eternal fight between Kantou and Kansai, the Eastern and the Western organized crime groups of Japan, he soon realizes that there are other powers on the stage, including a mysterious Korean organization that seems to be connected somehow to his past.