A meteorite crashes into the mountains and inside is an alien entity dubbed Yog goes around infecting and feeding off pollution where ever it goes. Meanwhile a small piece of the blob is separated from the main body where it eventually gets washed out to sea and parts of it eaten by a large prehistoric crustaceans and a terrapin on an island called Sergio Island, causing them to mutate into Ganimes and Kamoebas. The two monsters eventually come meet up and battle which attracts the attention of a new Titan, Gezora, who helps Kamoebas defeat Ganimes, before battling Hedorah and eventually Dogora.
