Long ago, two races ruled over Earth: HUMANS and MONSTERS.

One day war broke out between the two races.

The humans were fed up with the monsters evil doings.

After a long and deadly battle, humans were victorious.

They sealed the monsters underground with a magic spell.

Many years later…

MT. Ebott 201X

Legends say that those who climb the mountain never return.

The child looked over the mountain and saw the hole.

They then tripped, and fell down the hole and in to the world of monsters.

This is UNDERFELL.

The teenager slowly pushed themselves up from the bed of flowers. Their hair was short and dark brown. They wore a stripped black and red shirt with long sleeves and black shorts that stopped above their knees. As they got up they sat in the bed of flowers. "It didn't work…?" They sighed and stood up. They looked up above them and felt the warmth of the sun on their face. Little did they know that would be the last sunlight they would see for a long time. They figured there was nothing else they could do but walk forward.

As they made their way to next room they heard quiet sobbing. "Oh… Excuse me…"

The flower looked up and growled, but quickly stopped when they realized it was a human and not a monster. "Oh…" The flower's eyes lit up. "Chara?! Is it really you?"

The teenager shook their head. "No… I'm sorry…" They gave the flower and apologizing smile. "My name is Frisk…"

The flower looked up at the human. "Oh… I'm sorry." The flower sighed. "Nice to meet you Frisk… My name is Flowey… Flowey the Flower." He looked away. "I thought you were someone else."

Frisk frowned. "I'm sorry I could not be that person."

The flower looked up again, extremely confused. "What? Don't apologize for that." He began to look very worried. "Oh no… You can't be that kind down here. You'll die with the first monster you encounter!"

"Die?" They asked. They smiled. "I think I could try to befriend everyone down here."

The flower had an incredulous look. "Human, are serious?! Everyone down here was just waiting for another human to fall down here. They'll kill you on sight!"

Frisk frowned and moved down to be closer to Flowey. "I can at least try right?" They gave him a warm smile.

He didn't speak for a moment. "If you die… I'll never be able to live with myself." He sighed." You're just as naïve as Chara…"

Frisk hears the name once again. "Who was Chara?"

The flower's eyes widened at the question. "Just… A uh… Old friend of mine…"

They made a look of interest. "Are they down here? Can I meet them?" The flower made a blank expression before crying softly. "Ah! W- wait! What did I say?"

"They're dead. They have been… For quite some time…" He tried to smile. "I guess I'm still not over it…"

Frisk tried to sympathetic. "They must have been really close to you." They lightly petted the flower's petals. "They were lucky to know someone as kind as you."

Flowey didn't speak. In fact he turned away. He now faced the exit. "Yeah. Hey Toriel could be coming through soon!"

"Toriel?" Frisk asked.

"Yes! She's the caretaker of the Ruins! She makes her rounds to check for fallen humans." Flowey grimaced. "She bakes them into… Pies…"

Frisk gasped. "Really? That's so icky…"

They heard footsteps coming closer. Flowey shrieked. "Run!" He then disappeared into the ground.

Frisk, on the other hand, had nowhere to go. They looked around before just closing their eyes and preparing for the monster who was on the way.

A large… Goat monster walked in. Her horns tall but not too tall and they reminded Frisk of demons. She wore a black dress with slits on both side. Her fur was clean and white, while her eyes were yellow, the pupils red. Her ears were long, like a puppy, Frisk thought. She looked… Kind and motherly.

She gave Frisk a warm smile. "Hello my child. I am Toriel, caretaker of the ruins."