You were an ordinary ten-year-old child, but one day you decided to take a walk near the forest. You saw a cave and entered it, but suddenly fell into a hole. You woke up surrounded by flowers. You've fallen pretty deep. After walking a little, you met a talking flower named Flowey. At first you thought he was kind, but he attacked you, wanting to kill you and take your soul.

But, fortunately for you, Flowey failed, as he was stopped by Toriel, who enjoyed authority among the monsters living in the dungeon, and everyone respected her. Toriel immediately began to take care of you as if she were her child, and even gave you a room in her house. Toriel told you that you are the first person to enter the dungeon in several years.

Toriel began to teach you how to survive here, among the monsters who thirst for your soul. Not all monsters are evil, but many would like to take your soul. Toriel said that instead of fighting, everything can be solved with words. Listening to Toriel, you thought you heard someone else's voice in your head, but at first you thought you were imagining it.

Over time, you began to clearly hear the voice in your head. It was Chara's voice. At least that's how she introduced herself. Chara tried to convince you that you should kill all the monsters, completely destroy the Underworld, become powerful, almost divine and control everything.

Chara was the first person to enter the dungeon, and now she is a vengeful spirit. She constantly intrigues, cunning, knows how to persuade and manipulate. At first you refused to kill because you were just an innocent child. But over time, Chara's influence on you became stronger. Sometimes Chara could even completely control your body with your permission, and she knew how to get that permission.

Over time, you began to kill more and more. You even killed Toriel. You killed all the inhabitants of the Underworld. Due to Chara's influence, you were completely broken and now found yourself in an incomprehensible place. Everything around was dark and you couldn’t see anything. Chara suddenly appeared in front of you from the darkness. Previously you only heard her voice, but now you saw her.

Chara's red eyes looked at you. There was something similar to praise and affection in her gaze. Chara took the knife from your hands, which was clean, and put it away. Then she came very close and you heard her voice.

"Well done, you've eliminated everyone who could stand in our way. Now we can rule, and now I finally have what I wanted, you. No one can stop me from having you."