Sixty years ago, a young scientist was forced to escape to Earth from his home world during an unprovoked attack by an extra-terrestrial race. At the moment of his world’s destruction the bitter seeds of revenge had been planted within his heart. Driven by images of his world’s destruction, the scientist began constructing a fearful instrument of retribution. The refugee has aged into a local mad scientist known as Dr. G who patiently awaits the arrival of his long-time enemy. When the Zogelians attack Earth, Dr. G responds by unleashing the gargantuan robot Dodekain. However, the mad scientist has yielded control of the larger than earth-sized robot to an emotional twelve-year old. Somehow Takuma Ippongi must avenge the destruction of a planet without destroying his own in the process.