The film essentially follows the story of the Soviet original, with Rathbone and Domergue replacing two Soviet actors in roles as space-station monitors of the primary action. The rest of the film stars the remaining Soviet players, dubbed.
In the revised telling, it is 2020 and the Moon has been colonized. After traveling 200,000,000 miles, the first group of men land on Venus, where they find a prehistoric world in which the crew are attacked by various monsters, plants, etc.
By John Sebastian [CC0], via Wikimedia Commons