The imperial councilor Ullik decides to modernize his old mills by installing a new turbine. His eccentric brother-in-law Artuš tries to prevent this, as the construction work disrupts the statics of the tower in which he lives. Ullik's older daughter Tynda is a talented singer. The bewitched girl secretly accepts the courtship of the virile Václav, the son of the night watchman. Her younger sister, the doctor Marie, wins the heart and hand of the astronomer Zouplna, despite her father's prohibition...
František Smolík
as Ullik
Lída Baarová
as Tynda
Vlasta Matulová
as Marie
Rudolf Hrušínský
as Bohumil
Meda Valentová
as Rézi
Eduard Kohout
as Artuš Fabian
Marie Glázrová
as Žofka Pečulíková
Jaroslav Vojta
as Nezmara
Vítězslav Vejražka
as Václav
Karel Höger
as Dr. Arnošt Zouplna
Jindřich Plachta
as Zouplna
Vladimír Majer
as Ing. John Mour
