An epidemic of typhoid fever hits the Paradise Ranch and Barrett and Mitch Fears try to stop the spreading fever and the animosity of their neighbors toward a hippie commune that is suspected of causing the fever.

Mitch (Cliff Potts) has just got his pilot's license, and asks his father to join him for a ride. The plane is circling the Mauna Loa Volcano when it develops engine trouble and Mitch has to crash land the plane. Just at that moment, the volcano provides a little trouble of its own