The crowning achievement of the Weimar cinema, "Blue Angel" is an exquisite parable of one man's fall from respectability and the film that catapulted Marlene Dietrich to international stardom. Emil Jannings stars as an instructor of a boys' school. After learning of the pupils' infatuation with a nightclub songstress (Dietrich), he decides to investigate and is fatefully seduced by the siren.