Československá televize

An interstellar expedition is sent to study a strange planet. Despite the fact that creatures from various Earth time periods inhabit the world, the natives possess metal swords, even though they should have no knowledge of such weaponry.

A tale based on novel by Czech writer Bozena Nemcova.

After arriving at the mysterious castle, the university professor begins to encounter a sequence of mysterious events, to which he reacts with his rational thinking and tries to explain them logically.