In 1908, a giant meteor crashes in Siberia, destroying vast areas of the taiga. Several expeditions are sent out to search for its remnants, but they return empty-handed. A hundred years later, during construction work in the taiga, a discovery is made that proves the meteor was a space rocket that came from Venus for exploratory purposes and fell victim to a catastrophe. A mysterious report suggests a threat to Earth. The first spaceship from Earth was originally set to launch to Mars. However, this plan is now changed; the new destination is Venus.