Three men are planning a balloon ascent into the stratosphere. During the balloon flight, complications arise, the balloon is driven out to sea and the men face death.
Otto Gebühr
as Prof. Dr. Ernst A. Gruber
Sybille Schmitz
as Susanne Gruber
Cornell Borchers
as Ellen Gruber
Will Quadflieg
as Harry Altenberger
Hans Leibelt
as Martin Altenberger
Ewald Balser
as Dr. Thomas Robertsen
Rolf Moebius
as
Hans Paetsch
as
