Fatty Clarence, as always, went out for a walk and met with friends. They noticed a strange van and decided to follow the car. She drove up to the building and the workers began unloading some strange metal parts. Soon the children lost interest in what was happening and decided to do their own business, but in vain. It turned out that this event was the beginning of what happened later. Unexpectedly, the hot lava spread from the streets. Dirt flooded the path, leaving tires and mushrooms on the surface. It is for them that the hero will jump into Clarence Hopping Heat to get to the source and find out where the boiling mud river comes from.