A mysterious magnetic spool found during a construction project is discovered to have originated from Venus. A rocket expedition to Venus is launched to discover the origin of the spool and the race that created it.
Oldřich Lukeš
Ignacy Machowski
Julius Ongewe
Mikhail Postnikov
Kurt Rackelmann
Günther Simon
Hua-Ta Tang
Lucyna Winnicka
Yoko Tani
Ruth-Maria Kubitschek
Eva-Maria Hagen
Karen Fredersdorf
Gertraud Kreissig
Nico Turoff
Werner Senftleben
Eduard von Winterstein
Stanisław Igar
Artur Młodnicki
Józef Pieracki