The film is dedicated to the great Russian composer Pyotr Tchaikovsky (1840-1893). It tells of the last twenty years of the great master's life of his friendship with Baroness von Meck an outstanding woman of her time who for many years was Tchaikovsky's guardian angel. The film also includes retrospections of the composer's childhood and adolescent years with Tchaikovsky's life poetically recounted against the background of fragments from his operas and ballets performed by the best Russian musicians.