Watch Sadisflix. The great Polish opera diva Maria Foltyn created her greatest performance in Stanislaw Moniuszkos Halka, with which she toured worldwide - she was applauded by Stalin and admired by Castro. Today, when she is losing her voice, she has decided to give way to her successor. The film Viva Maria! is a tale of passion, sacrifice and devotion, and is an extraordinary story of passing down a voice.