In the era when coal was the main fuel, Guooka Tiefu (Okada Junichi) predicted the development of oil in the future and immediately started an oil business in Kitakyushu. In the face of tough obstacles from domestic operators and European and American oil giants, he was undaunted, and with a different thinking and high degree of action, as well as cherishing the hearts of his subordinates, he developed a new career territory; even if Japan was defeated in the war, the iron-made and resolute posture has never changed. However, the "incident" that had a greater impact on the Japanese eventually happened! In the face of hostility from the oil giants, oil transmission routes were blocked, and there was no oil to sell, ironwork made a crazy decision that ── secretly dispatched the last huge oil tanker "Izumaru" to Iran to import oil directly from Iran, and this action was tantamount to the enemy of Britain, which dominates Iran. Ironbuilding, despite the opposition of its subordinates, launched a difficult battle in the face of the oil giants. Can Japan Seung Maru avoid the eyes of the British fleet and return to Japan smoothly? And why is iron made by people called "sea thieves"?