Time travelers from 2204 AD, appropriately called the "Futurians", returned to Japan's past in mid-1992 to submit a grave message. The people from the future warned the Japanese government that Godzilla would soon attack the country's nuclear reactors, and the resulting radioactive pollution would eventually render the country uninhabitable. The Futurians suggested time travel as the solution. If they could return to the year 1944, they could prevent the "Godzillasaurus" on Lagos Island from undergoing nuclear mutation. The Japanese government agreed with the proposed solution, and Miki Saegusa, Kenichiro Terasawa, and Professor Mazaki were sent to accompany the time travelers on their mission.
As one Futurian, named Emmy Kano, led the crew aboard the time-traveling vessel dubbed KIDS, they were startled by three peculiar beings. They were genetically engineered animals called Dorats. Considered the perfect pet in the 23rd century, they were not only adorable little imps that could brighten even the gloomiest day, but they were also very easy to remotely control. The jittery sprites accompanied the crew as they embarked on their journey to return to Lagos Island in the year 1944.
When the mission to relocate the Godzillasaurus was a success, something strange occurred. Emmy Kano released the Dorats into the lush jungle of the tropical island. They played in the forests, unaware that their masters had left them alone on the island. The tiny creatures survived on Lagos for ten years, before they were irradiated by the American H-bomb tests. The Dorats merged and became one. They grew to 140 meters in height and mutated into a fearful dragon. King Ghidorah was born.
For thirty-eight years, King Ghidorah waited until the Futurians finally summoned the beast. The once friendly creatures were now one terrible anomaly, and the deceptive Futurians now had a monster with which they could decimate Japan!