Haruma Yuuki, a high school student driven by reckless ambition and physical strength rather than intellect, has spent years dreaming of joining the Winds of Cemetery, known as Linda, the most formidable motorcycle gang in his region. His idol is Zemba Knight, the third-generation leader of Linda, a man who has never lost a fight or a race on the streets. The original story follows Haruma as he is introduced to the radical and dangerous lifestyle of the gang, navigating violent conflicts and high-stakes motorcycle races while learning crucial life lessons that come with life on the edge.

The narrative arc of Kuroi Zankyō Kanketsu-Hen (Black Reverberation Final Chapter) shifts focus to the intense rivalry and legacy surrounding the gang's leadership. Set after the events of the initial series, this continuation delves into the bloody lineage and deep-seated animosity between two opposing factions: the Rinja and the Kobura. A central figure in this final chapter is Iwaki, a man who directly competes with Haruma Yuuki, who is himself one of the primary candidates vying to become the next leader of the Rinja.

Frustrated by the weakness of his own team, Iwaki abandons them and seeks power elsewhere by knocking on the door of the Kobura. Within the Kobura, he encounters a mysterious and formidable man who, in the past, successfully led the Cobra gang to rise in power until it could stand as an equal threat to the Rinja. This meeting ignites a final, brutal struggle as the series pursues the dark reverberations of the past, exploring how the blood feuds and ambitions of previous generations dictate the violent present and the fight for control of the streets.