Engineer Frank Reynolds returns to his Heimatland, where he finds a blue diamond in Regine. But she has a brother who is not a diamond at all.
Erich Waschneck
Director
Luise Ullrich
Regine
Anton Walbrook
Frank Reynold, Ingenieur
Olga Tschechowa
Floris Bell, Schauspielerin
Ekkehard Arendt
Merlin, Floris Bells Begleiter
Hans Junkermann
Professor Gisevius, Franks Onkel