A collection of synopses “Musicals. Summary” completes the series “Immortal Operas. Brief Contents. Let's start with the fact that the opera (operetta) is of European origin. They were born in Italy and France. The musical is a child of American culture. The vocals in the musical are used less intensively, since the plasticity of the actors is important. Ideally, a musical actor should be a generalist who can synthesize speech, singing, facial expressions, plasticity and dance in one image. Dance numbers are closely related to the main action.