Lunch is ready! Prepared to eat his delicious sandwich, Blippi notices his old friend Horace the Fly. Horace is walking upside down on the ceiling, and after shrinking down, Blippi joins him.

On a drive through the mountains, Blippi is nearly hit by a puff of smoke from a volcano vent! Curious about what makes a volcano erupt, Blippi and FETCH fly into the volcano.