Gun Koma is a typical high school student with a deep passion for motorcycles and a craving for speed. When a classmate invites him to join a four-hour race that might help him break into the professional scene, Gun takes the chance. The only condition is that he must partner with his long-time street racing rival, Hideyoshi Hijiri. While the prospect of racing on an official track is alluring, he must brace himself and put aside his grudges against Hideyoshi to win the championship.