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
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.