This episode briefly tells how musical instruments appeared, reveals etymology of the words "orchestra", "symphony" and lifts the veil from the history of the first performing ensembles. Inquisitive viewers will also get the answers to the questions "How are modern orchestra and ancient Greek theater connected?", "How are musicians arranged on a stage to achieve harmonious sound?" and finally, "How are separate families of instruments grouped in orchestra pit?"

Story about each group of musical instruments is supported by some extracts from the "Young Person's Guide to the Orchestra" by English composer Benjamin Britten, where richness of timbral colors, design features and dynamic capabilities of the orchestral "inhabitants" are described. Final point of the "journey" is a concert fragment of the Cologne Radio Symphony Orchestra.