Pirx, an experienced pilot, is hired to go on a top-secret mission to evaluate some 'nonlinears' (an experimental model of android) for use as crewmembers on future space flights. Pirx and this intriguing crew are sent out to launch two satellites into the rings of Saturn, but he is determined to find out and identify a hostile unhuman coworker among them.
The trio of adventurous pals, a man who is a scientist, a fine lady and a former military pilot are in the Tibetian jungles looking for some mysterious vase that holds a metal container that is of no mundane origin.
After a strange incident, a group of russian space commandos starts developing supernatural powers. But how did they acquire such abilities and what is their intentions?
Tallinn, Estonia, days before outbreak of World War II. Hotel detective and Polish writer team up to find Tear of the Prince of Darkness, a legendary ring which can bring Satan’s rule over the world.
