In 2020, following the colonization of the moon, the spaceships Vega, Sirius and Capella are launched from Lunar Station 7. They're to explore Venus under the command of Professor Hartman, but an asteroid collides and explodes Capella. Vega stays orbiting and sends the astronauts Kern and Sherman with the robot John to the surface of Venus, but they have problems with communication with Dr. Marsha Evans in Vega. The Sirius lands in Venus and Commander Brendan Lockhart, Andre Ferneau and Hans Walter are attacked by prehistoric animals. They use a vehicle to seek Kern and Sherman while collecting samples from the planet. Meanwhile, John helps the two cosmonauts to survive. (Re-edited version of Pavel Klushantsev's 1962 Soviet sci-fi Planet of Storms, dubbed into English with additional scenes.)
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