A cold, bleak cavern of depression. The lives of these monsters can't hold much for long. They are not human, but they cannot live in such conditions. After hearing a new scientist and constructors would save the monsters' they cheer for him and whoever helps along his path.
"What do you think might happen, dad?" the voice is deep, but lingers with the body of a teen. "I mean, you can be worshiped by such a desperate kingdom."
"Nothing will happen, Sans. All that will happen is that we will finally have something to research on."
"Listen to him, Sans." another voice. It sounds older. "We will finally recreate our people once again."
"Papyrus is exactly right, Sans. You can learn a thing or two from such a smart mind." Sans shrugs in anger.
"Thank you father." The three walk to the royal's hideaway, to find what they might do. A castle in ruin. An ancient vessel of a once prominent civilization, and that vessel in arms of the two royals, the king and queen of the underground.
"Finally, you are back! We are in need of a good home. The underground is too cold! We need a warm living place for me and my wife." Gaster notices the queen is holding a child. An Infant.
"I never seen your child, my king. May I see him or her?"
"But... We must speak upon this hard matter!"
"I understand. Before we go on, these two are my sons." the two show themselves. A bright blue light shines on Sans and an orange glimmers on Papyrus. "I am deeply sorry if it was rude I didn't introduce them earlier."
"Not at all. Now, we must speak of the situation."
"What is it you must know, my king?"
"What are your plans?" Sans is showing his worry. "What are your plans to rebuild my kingdom?" Gaster almost shivered in worry as he spoke i those words.
"If you must know, my king, we plan to create a powerhouse, an electrified grid of metal and copper that will give your cold home some warmth." Papyrus smiles. " Then, we build the cities, but of course we build your palace first. Afterwards, we shall be on our way. You shall never see us again."
"Are you sure you need to leave afterwards?"
"Yes. I am sure of it." Gaster the two brothers shake the royals' hands. Sans gives a deep smile the queen as she held her child. "Oh! I almost forgot, you only mention me to your people as you bring them the news. No one else shall know of these two."
"Why is that?"
"There is no reason, my king. I want these two be a secret of the rest of the monsters."
"If that is your wish." the two walk away and soon disappear in thin air. The kingdom and its royal owner is worried this might take too long. "What do you think they're up to, Torie?"
A large lab in the the deep underground is hidden in within it's depths. Gaster is planning on how much power should the powerhouse store. Papyrus is working by himself on his own project as Sans watches in boredom.
"So..." Papyrus rolls his eyes. He knows what he's doing. "What you doing, Papy?"
"An experiment Sans..."
"What kind?"
"It's just an experiment... What are you doing!?" Papyrus panics as Sans snatches the odd experiment out of his hands.
"Sans! What are you doing!?" the two struggle as Sans makes sure Papyrus doesn't get it back. Despite Sans and his shortness, he still managed to keep it away from him.
"What's the magic word?"
"JUST GIVE IT BACK!
"Magic word!?" Papyrus gave out a large sigh. The words he hated to say. Words that he won't want to say even if kills him.
"Will you leave me alone?"
"We won't find out until you say it!"
"But you'll give it back?"
"Yes."
"Fine!" He readied himself. "Spaghetti I forgety... As I speak I won't regrety." Sans hands him his experiment. He goes back to work and finally relaxes.
The door behind them slams open. "Sans, come with me." Papyrus looked away from his project and looked to Sans and Gaster. "I need to show you something" The two walk into his lab while Sans looks around curiously. They soon go out into the cold caves of the underground. "Look at this. Solid floor, right?"
"Yes?"
"Wrong!" he stomps on the floor and it collapses. Lava exerted from the ground.
"What are you showing me, dad?"
"I had an epiphany. Heat can be used as a force, yes? And mineral can be our oil. I have a marvelous idea, my son."