In early 1970s Tokyo, a young man named Jiro has left his home in Okinawa to seek a new life in the capital. He works as a taxi driver, but his days are consumed by a deep rage and frustration over the American military occupation of his beloved homeland. The only release he can find from his anger, dissatisfaction, and anxiety comes in the dangerous nights of high-speed motorcycling. He rides a CB750 FOUR, known as the "Nana-han," a machine considered the fastest motorcycle in the world at the time with a top speed of 200 kilometers per hour, a speed that exists on the razor's edge of death. The story explores the contradiction of his existence as he wears American clothing while burning with the desire to throw Molotov cocktails at American soldiers. Ultimately, the narrative is left unresolved, ending abruptly without a proper conclusion, leaving only the roar of the CB in the night as a lasting image.