主人公は東京でストリートダンサーとしての夢を追うが、新宿駅で異世界へ迷い込む。そこではダンスが戦闘技術となり、生存の鍵を握っていた。「リズムの闘技場」で敗北するも、師匠・安田の指導を受け、新たな戦い方を習得。夢で「完璧なステップ」を見たことで、異世界のリズム法則を理解する。仲間と共に禁断の技「ビートクラッシュ」を編み出し、異世界を操る黒幕と対峙する。最終決戦ではリズムを無効化する敵と戦い、世界の均衡を守るため最後の一歩を踏み出す——。
The protagonist moves to Tokyo as a street dancer but finds himself in a world where battles are fought through rhythm. To survive, he adapts his dance into combat techniques, yet suffers defeat in the "Rhythm Arena." Guided by his mentor Yasuda, he learns new strategies. A dream reveals the "perfect step," unlocking the world's rhythm-based laws. Alongside his allies, he develops the forbidden technique "Beat Crash" to challenge the mastermind behind the world's distortion. In the final battle, he faces an opponent who nullifies rhythm, taking his last step to restore balance——.