Seibei Iguchi leads a difficult life as a low ranking samurai at the turn of the nineteenth century. A widower with a meager income, Seibei struggles to take care of his two daughters and senile mother. New prospects seem to open up when the beautiful Tomoe, a childhood friend, comes back into he and his daughters' life, but as the Japanese feudal system unravels, Seibei is still bound by the code of honor of the samurai and by his own sense of social precedence. How can he find a way to do what is best for those he loves?

Shouichi encounters his old friend and caretaker Dr. Higashi Kunieda. Dr. Kunieda, a friend of Yoshihiko Misugi, took care of him while he was hospitalized with amnesia. After catching up on a year of separation Shouichi abruptly leaves to house to fight an Unknown as Agito Burning Form. Unfortunately, after the Unknown flees Shouichi loses control of himself and attacks Dr. Kunieda, who followed Shoucihi and watched him transform. Dr. Kunieda managed to calm him down but Shouichi becomes to afraid of himself and runs away.

Takeshi Hongo is a promising young man with a passion for motorcycle racing. However, his dreams are suddenly ruined when he gets kidnapped by Shocker, the evil secret organization planning to dominate the world. After being remodeled into a cyborg, Takeshi escapes and swears to protect the world from the inhuman monsters.