The chairman of the large conglomerate Taki Group suddenly dies. A dark battle ensued over his inheritance, but thanks to the efforts of acting chairman Totsuka, things calmed down, and his only son, Tetsuto Taki, became chairman. However, Tetsujin hands over the chairmanship to Totsuka, and Tetsujin, who has a strong sense of adventure, goes to Country K with his Mexican friend Mario. The dictatorial country K is in the midst of a struggle with a revolutionary organization. Mario's younger brother has been captured by a secret organization!!