The hypnotic life and times of Leo Theremin, the Russian genius who invented the first electronic instrument, which became a staple of the soundtracks of sci-fi movies (The Day The Earth Stood Still), and was used by experimental musicians such as the Beach Boys’ Brian Wison for Good Vibrations. The musical history of the unique instrument, the Theremin, is juxtaposed with its creator’s personal saga: his strange politics and relation to Stalinism, his poignant love story.