Captain Dan Loomis is selected to find out what happened to the four expeditions to Venus which mysteriously disappeared after landing. Commanding Ship #5, Loomis and his crew land on Venus. From inside the ship, Loomis and the others note the crews of the previous missions are walking around without helmets, all bearing dazed smiles on their faces.One crew member notes they appear as if the are "zombies". Loomis orders his men to remain in the ship as he goes out helmetless for a minute. He further orders that they come retrieve him in a minute wearing their helmets.