A young couple on a photographic assignment learns the hard way about the effects of high altitude and high temperatures on light aircraft. Airplanes can also suffer from a sort of hypoxia as well. Just like a person, its performance suffers when it’s not getting enough oxygen. Poor ol’ Harry Bliss and his wife Lois buy a new airplane which Harry thinks has all the power he will ever need, until he got to the mountains. He ignores some good advice and finds out the hard way.