The story follows a band of young wireless enthusiasts who join forces with forest rangers to employ radio technology in locating and fighting a large mountain wildfire. Episodes alternate technical explanation and action: demonstrations of emerging broadcasting techniques, an account of an ice-patrol operation, hazardous rescues from fire, water and collapsing terrain, encounters with wild animals, a subterranean mystery, and clashes with local antagonists. Practical radio work, teamwork, and daring field operations drive the plot toward a tense struggle with the blaze and a final deliverance when relief arrives.