Three astronauts land on Mars, hoping to find valuable minerals. After discovering a rich deposit of uranium ore, one of the men becomes increasingly paranoid. Is it just his imagination, or are they really being watched? A crystal egg reveals live tableaux of the planet Mars. A 19th Century scientist is obsessed with investigating the crystal, but the antique shop owner who came across the seemingly worthless glass hopes to sell it ASAP to a tall, insistent stranger, for whom no price is too dear. The delay while the scientist experiments on the egg makes the buyer even more desperate.
