Taro Uno, nicknamed "Fighting Taro," has joined Hyakusho Trading Company, which is currently busy with bidding for Southeast Asian reparations supplies. This is because their competitor, Toyo Bussan, is considered a strong contender. One day, Taro comes to the rescue of Toyo Bussan's president, Iwashita, and his illegitimate son, Kenji, who are being harassed by a local gangster named Kankichi.