Kouji Hinashi, who is trying to revive his fallen family, enters the shipping industry in Yokohama in order to become a major marine merchant that rules the seven seas. There, he gets into trouble with the Yamaoka-gumi gang, and due to a misunderstanding, he becomes hostile to Honmoku Bancho Taki Shigeyoshi. At that moment of crisis, with the sound of a conch shell, the sea men who had previously served the Kairi family gathered to their aid.