In the Mohave Desert, Olga runs a gas station, lunch counter, and auto camp with her younger sister Myra       In a 24-hour period, Olga must deal with Myra's desire to go to a town dance with a cad, the appearance by happenstance of George, an old boyfriend whose conduct is never above suspicion, and the overnight presence of two women recently divorced in Reno, who, with a chauffeur, are carrying valuable jewels       George gets wind of the jewels and plays with Olga's heartstrings to set up a robbery       Myra arranges to sneak off with her beau       It's hot, and the heat lightening is crackling on the horizon       Is Olga's life of peace and hard work in the desert about to change for the worse