The heat of the moon's atmosphere heats up as the fuel of the rocketship burns. The fire slowly weakens as the rocket gets closer into the surface, landing them safely onto the ground. Having the rocket completely erect from the surface, they immediately went outside in awe to view the moon's landscape in their own eyes.

Having their moment of life on the moon, they brought their equipment to gather samples of a moon rock. The procedures of gathering the rocks are quite simple in the look of an eye, but it is complicated when done in action. So they gathered plenty of rocks for their own research use.

Once they have gathered an enough amount of moon rocks, the three then decide to depart from the moon. However, while they were walking on their way back to the rocketship, one of them glanced back at the moon. Having his footsteps halt, he noticed something unusual with the moon.

"A cave", one says. "Why is it there?"

Moons don't have caves, they are only filled with craters and lifeless ground. This one is different, as they had not seen the cave from a distance until now. Having curiosity filling his brain, he decided to walk through the cave. The other two asked him where he went, but at this point they would not care for a moment assuming that he forgot something back there.

A few hours pass by, they have not seen any single body of him. The two have their hearts pound up faster as they wait for their fellow to return. It would not be as long, as they heard a screaming voice from afar. The two were in utter shock about what they heard, so they immediately found the source of the voice.

They glanced at the same point where one of them saw earlier. It took her a while to notice the mysterious cave that has been lying from the peak of the 'mountain'. So she told the other to follow there, as she might find the place of that scream.

A few minutes pass by, they have finally reached their destination. Although the cave is not that large, they decided to go in. Another one hesitates, asking if this was the source of the sound. But as she was going to answer, they heard another scream. This loud inhumane scream was enough to point out that the scream came from this cave. And as they were ready, they decided to go in.