Dr. Hohner, theatre physician at the Vienna Royal Theatre, murders his mistress, the star soprano when his jealousy drives him to the point of mad obsession. Ten years later, another young singer reminds Hohner of the late diva and his old mania kicks in. Hohner wants to prevent her from singing for anyone but him, even if it means silencing her forever.
Boris Karloff
as Dr. Friedrich Hohner
Susanna Foster
as Angela Klatt
Turhan Bey
as Franz Munzer
Gale Sondergaard
as Luise
Thomas Gomez
as Count Seebruck
June Vincent
as Marcellina
George Dolenz
as Amato Roselli
Ludwig Stössel
as Carl Baumann
Jane Farrar
as Jarmila Vadek
Ernö Verebes
as Brunn
Lotte Stein
as Mama Hinzl
Scotty Beckett
as The King
