An alternate universe of Undertale, in which Frisk decides to stay underground for the rest of his days. DISCLAIMER: As well as the usual "I don't own Undertale or its content" spiel, I also make a few assumptions as to how the game goes. Frisk is male, and an old child - pre-teens. The run is a neutral run; although Frisk hasn't harmed anybody, he wasn't aware of the possibility of dating Alphys, and so is unaware of the True Lab. This story contains spoilers for all three endings! Cover art provided by Serain, who can be found at http://serain.deviantart.com/

The barrier is broken, monsters and humans are living in peace, everyone is happy except for one person. Frisk has been getting waking nightmares about not saving Asriel. They want to save him to erase all guilt and to be with their friend. But Asriel isn't the only one that needs to be saved. Something, someone lurks inside Frisk's soul. Someone deadly and has a hunger for power, and can kill anyone they want. A/N Frisk and Chara are both gender ambiguous in this story. Also there will be a little bit of Frisk x Asriel in this story, but this is not a Frisk x Asriel fanfiction. Credit to @karinacat59 for the cover. Undertale belongs to Toby Fox and none of the characters are mine.

After Frisk goes missing, Caitlin, Frisk's twin sister goes looking for her in the the last place she saw her. MT Ebott, the mountain of dark legends, she finds a necklace that belonged to Frisk on the ground. Just like Frisk, Caitlin tripped and fell into the Underground. Caitlin finds things she never knew existed.

{Can everybody PLEASE stop reading this awful story so I don't feel bad about deleting it?!} This is an AU where all 7 human souls fall down to the Underground at the same time. DISCLAIMER: Several things I have decided on for this fanfiction. Toriel and Asgore got divorced after the death of Chara and Asriel and Asgore's declaration of war. The human souls will be called by names I have decided on for them, not by their soul traits. (Cody and Clover are from the fangames Undertale Green (Kindness) and Yellow (Justice) respectively. The others are Hannah (Perseverance), Amy (Integrity), Echo (Patience), and Leo (Bravery). Chara is a ghost only visible to those that remember (I'm going with Sans, Alphys, and Mettaton (since the latter 2 probably have their research to gain clues of the past timelines. I'm not saying they remember everything, but...), as well as Frisk and the other fallen humans.