 Dr. Hell and Dr. Kabuto are two archaeologists who found the remains of an ancient civilization capable of making giant robots. When Dr. Juzo Kabuto found out Dr. Hell s plans of creating the robots to conquer the Earth, he became his enemy and started the construction of Mazinger Z, a fantastic giant robot, as a defense weapon. The story starts when Dr. Hell sends his first assistant, Baron Ashura, to kill Dr. Kabuto. The attempt is successful, but not completely: Just before his death, he is found by his grandson, Kouji Kabuto, and informs him about the recently finished robot hidden on the underground basement. From this moment on, and with the help of Dr. Gennosuke Yumi -Dr. Kabuto s ex-assistant-, the inexpert Kouji manages to learn how to pilot powerful Mazinger. Dr. Yumi also made a robot of his own, called Aphrodite A, and piloted by his daughter Sayaka, which was primarily conceived as a peace time robot. Both Mazinger and Aphrodite together, episode after episode, combat and destroy every mechanical monster created by Dr. Hell and his associates, Baron Ashura and the Iron Mask, until the last episode of the first season, where Mazinger is finally destroyed, and Kouji is supposed to die. In a second season of the series, a new character appears: Dr. Kabuto Jr., father of Kouji, who wasn t dead, but constructing an even more powerful robot: Great Mazinger... Anime series composed of 92 episodes.