Frisk continued along the path with a small smile as she overheard Echo Flowers repeating a conversation of the past. I forgot how nice this was when you didn't have… Just don't think about it Frisk, he'll be ok and then we'll all be on the surface together for good.

"A long time ago, monsters would whisper their wishes to the stars in the sky. If you hoped with all your heart, your wish would come true. Now, all we have are these sparkling stones on the ceiling…"

"Thousands of people wishing together can't be wrong! The king will prove that."

"C'mon, sis! Make a wish!"

Frisk paused before going back to the first Echo Flower and gently whispering a wish to it before smiling as she continued through the room.

"I wish my sister and I will see the real stars someday…"

With a gentle smile Frisk continued along the path before reaching a wall as she gently pushed it causing a hidden path to appear as she continued only to pause and frown at the familiar signs detailing the war between humans and monsters.

I wonder what started the war in the first place… if no monster ever actually managed to take a single human SOUL. Frisk thought before shaking her head again. "I can't worry about things like that, I have to make sure we're there for him when he arrives."

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Sans collapsed to his hands and knees as a sharp pain shot through his entire body.

What just happened? My SOUL shouldn't be hurting this much especially considering the reason and yet… why? Sans thought before glancing up at Chara's SOUL which was glowing brightly with the LV it had gained. Wait a second… no, don't tell me that's what's happening? When the reset happened… great, as if this wasn't going to be hard enough, I'm carrying around a poison that's getting deadlier.

Suddenly a sound from behind him got Sans attention as he barely managed to teleport away from a Moldbygg's attack before turning towards it.

"Heh, I guess I should have figured this would happen eventually… A little surprised it took this long tibia honest." Sans admitted before forming a bone only for it to fade away as he winced. Not good, my body can't handle being this close to that for so long.

In its confusion seeing that the Moldbygg paused and moved slightly closer to Sans just as a smaller bone impaled it causing it to roar in pain.

"Papyrus did you hear that?" Undyne's voice called. "He has to be over this way."

"I heard it Undyne, I'm right behind you but… please give me a chance to speak with my brother before…" Papyrus' voice started before trailing off.

Paps… you're the best. Sans thought as he formed a blue bone and fired it at the Moldbygg before wincing as the Moldbygg tried to dodge only to be turned to dust as it moved. "Not quite halfway there… remind me to never make another promise, alright Frisk?"

With that said Sans vanished mere seconds before Undyne and Papyrus arrived to see two more piles of dust.

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Frisk continued walking through Waterfall only to pause when she reached the familiar raft that would take farther as she closed her eyes. Don't worry Sans, I promise everything will work out and we'll be ok soon.

With that thought in mind Frisk stepped onto the raft as it floated across the water only to pause when a spear struck the ground in front of her and Undyne emerged from the darkness forming more spears with which to impale Frisk.

Frisk immediately started to run from the barrage of spears as the metallic echo of Undyne's footsteps and the rush of air from the passing spears echoed through the cavern.

"Just a little farther." Frisk whispered to herself before running into another patch of extremely tall grass as a last wave of spears passed overhead and Undyne's footsteps echoed as she approached and she grabbed something in the grass only to put it back before walking off.

That was way too close, with everything that… well considering how important my message was I forgot that Undyne never made it easy to get through here. Frisk thought as she slowly walked in the opposite direction just before Monster Kid ran out excitedly.

"Did you see that, Undyne just touched me!" Monster Kid mentioned excitedly. "Boy are you unlucky, if you'd been standing just a little to the left… well don't worry, I know we'll see her again."

Frisk smiled at that. "Hopefully, but you're the lucky one this time."

"Yeah, I really am." Monster Kid grinned before running off only to trip and fall.

"Are you alright?" Frisk asked before helping Monster Kid get back up.

"Yeah, I'm ok. Thanks." Monster Kid said politely before running off.

Frisk smiled before continuing through Waterfall only for her eyes to widen as she saw Sans standing next to a telescope. "Hi Sans, what are you doing here?"

"Hey, not much I was just thinking of getting into the telescope business. You want to take a look through this neat telescope?" Sans inquired. "It's normally 50000g but since I know you… you can use it for free."

Frisk closed her eyes as if in thought about Sans offer before smiling. "Alright Sans, thanks."

"Knock yourself out." Sans smiled as Frisk walked up to the telescope and looked through it only to see nothing but red.

"Sans… I think your telescope is broken." Frisk frowned.

"Huh, you weren't satisfied? Tell you what, I'll give you a full refund." Sans offered.

Frisk looked at Sans for a few seconds before smiling and laughing. "Ok, thanks."

Sans chuckled himself as Frisk walked past him and farther into Waterfall.

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Sans closed his eyes and tried to catch his breath as the agonizing pain racing through his body seemed to get worse with every single step he took, the Determination inside of Chara's SOUL acting as a poison that would inevitably kill him.

"First the old la… Toriel, and then Frisk. I've got to stop making promises like this, they're bad for my health… and for everyone else's too." Sans noted before opening his eyes and looking at the dust all around him only to frown when he heard something from behind him.

Sans turned to see what looked like a Moldsmal from the ruins before it grew and started roaring at him.

"That sounded like a fight, come on Papyrus!" Undyne called from the distance. "We might be able to catch him."

"I'm right behind you Undyne, but please give me a chance…" Papyrus replied. "There must be a valid reason for what he's doing. We both know Sans, this isn't normal."

Papyrus… what did I do to deserve such an amazing brother? Sans thought as he formed a Gaster Blaster and aimed it at the monster in front of him. "Sorry, but this may be the only way for us to get our freedom."

The Moldbygg roared at Sans just as the blast struck it causing it to go flying and get impaled on a bone as Undyne and Papyrus arrived to see it crumble into dust.

"Brother, what's happened to you?" Papyrus asked fearfully. "Please stop, we want to help you."

Sans turned to Papyrus and Undyne only to frown. "I know you do Paps, and I really wish you could help me. It's just not that simple."

"You keep saying things aren't simple, but you refuse to tell us what's really going on. What's wrong with you Sans?" Undyne questioned angrily. "This is the last time I'm going to ask you."

"I told you Undyne, I can't tell you now and even if I could you wouldn't understand." Sans told her. "Just trust me that this is for…"

Suddenly Sans collapsed to his hands and knees as another shooting pain raced through his body.

"Sans!" Papyrus cried in horror.

"Papyrus… sorry bro." Sans whispered as he vanished.

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Frisk continued down the winding path over the underground lake as she closed her eyes in thought. Sans has to be going faster than me, especially with his shortcuts and I still need to go to the True Lab later. There has to be something I can do to help him… but what can I do from here?

As Frisk continued along her path she passed a few Echo Flowers repeating a conversation they'd overheard.

"So? Don't you have any wishes to make?"

"… hmmm, just one, but… It's kind of stupid."

Frisk frowned hearing that. "It isn't a stupid wish, and pretty soon it'll come true for good."

Just as she said that Frisk's phone started to ring.

"Hello, human Frisk it's the great Papyrus." Papyrus told her. "Are you busy?"

"Not too busy to talk, is everything ok?" Frisk inquired as she continued along the path.

"Everything is… mostly ok, I've spoken with Undyne and she's well…" Papyrus started hesitantly.

"She's not looking forward to spending time together with a human, is she?" Frisk guessed.

"It isn't you Frisk, Undyne is just trying to do what is best for all of monster-kind. I'll admit her methods are a bit… murdery, but her heart and SOUL are in the right place." Papyrus clarified.

"I understand." Frisk mentioned. "Thanks for…"

"Oh, human Frisk don't be discouraged. I'm certain things will work out." Papyrus mentioned.

Yeah, you're right Papyrus. Frisk thought with a smile. "Yeah, you're right. We just need to trust that it'll be ok."

"Exactly." Papyrus smiled before hanging up.

Frisk closed her eyes before putting away her phone and continuing along the pathway.

"Don't say that! Come on, I promise I won't laugh."

Frisk smiled at that before frowning as she noticed a familiar sign explaining how humans feared the ability of monsters to absorb human SOULS.

"That isn't fair, even if they can do something the monsters never did take a SOUL from humans and they're all really nice." Frisk said before frowning. Sans, I promise this time everything will work out. I just need to keep moving through the Underground and with their help we'll stop the resets for good.

Suddenly a tentacle rose out of the water as Frisk froze before she suddenly smiled remembering what that was.

She continued through the room as more and more tentacles rose out of the water before eventually stopping as she heard a familiar voice and an octopus rose out of the water and stared at her for a few seconds.

"Hey… there… noticed you were… here… I'm Onionsan! Onionsan, y'hear!" the octopus mentioned introducing itself.

"Nice to meet you Onionsan, I'm Frisk." Frisk smiled.

"Hi Frisk, so you're visiting Waterfall, huh! It's great here, huh! You love it, huh!" Onionsan guessed with a smile as Frisk nodded.

"Well, I'm just passing through but it is a great place." Frisk answered.

"Yeah it is, I think so too." Onionsan said. "It's my Big Favorite… although, the water's getting so shallow I have to sit down all the time… and all my friends moved to the city to live in a crowded aquarium…"

"All your friends moved to a crowded aquarium?" Frisk inquired. "Don't you miss them?"

"Maybe a little, but the aquarium's full anyway so even if I wanted to…" Onionsan started before smiling. "That's ok though, Undyne's going to fix everything and then it'll all be ok y'hear!"

Frisk just smiled. You're right Onionsan, everything will be ok. This time, the three of us will stop the resets and we'll be able to stay on the surface for good.

(Sans is continuing his path of genocide through Waterfall but is starting to suffer adverse effects from the growing amount of Determination in Chara's SOUL, meanwhile Frisk is traveling through Waterfall herself in an attempt to make sure everyone is there when she reaches the barrier. Next chapter the two of them will continue their respective journeys through the Underground. As always any reviews or critique is appreciated.)