Hoppy and Lucky have been called in to investigate a series of stage holdups. The robbers are taking gold from Colby's mine and Hoppy suspects it may be ex-outlaw Colby himself.
Grace Peterson works in department stores "Tutto per Tutti", along with many other young people. His employment contract entitling them to live in a boarding house built specifically for them by the company but on the other hand, forbid them not fall in love or marry under threat of dismissal.
Betty Bryant is an ambitious newspaper reporter in love with Dan Barton, a member of a big-city Emergency Squad who are trained to deal with riots, cave-in, explosions, fires and other emergencies where lives are at stake.
This short documentary, presented and directed by MGM sound engineer Douglas Shearer, goes behind the scenes to look at how the sound portion of a talking picture is created.