Concept #4
Heres the story so far:
This is a planet that has no sun. The big structure is an on going project by the aliens from a far world, who has come here to generate a type of sun energy using the moon light. The lrage alien structure at the very top (around object) rotate with the moon 24/7. Moon light comes through (soma) down into the structure, which converts soma into fire (agni), and sends it back to the moon to create a sun energy for 12 hours on and 12 hours off.
The characters in the frontground are ordered to stop the alien, do to ignornce, who believe the aliens are here to create energy for their own useds, as a form of food.
The captain who ordered the humans hates the aliens do to a bad history, (his family were killed by alien, which at the time was a mistake). The aliens were trying to make peace with the humans,Which the humans were afraid of. The captain's father at the time was the commander drawing out a prefect plain to destroy the alien's world. So the alien's had no choice but to kill the commander. The son (the now captain) is the only survivor of that family, who is carrying out his fathers wishs.
So this scene is a revenge!