"Human! I need you to do me a favor!" Undyne screamed as she kicked in the door of the skeleton brothers house, startling the three occupants inside.

Frisk had moved in with Sans and Papyrus after breaking the barrier. Even though they now had access to the surface, Sans, Papyrus, Frisk, and many other monsters stayed in the underground. They had built lives down there and enjoyed their community. Of course they went up to the surface a lot and enjoyed every minute of each visit, but they still loved their homes. 

Frisk and Sans looked up at Undyne as she entered the home, ripping the video game controller out of Frisk's hand. Papyrus walked out of the kitchen holding a pot of spaghetti. A very odd atmosphere swept over the house.

"She was going for a high score. You could have waited like five minutes."  Sans said with a laugh.

"NO TIME!" Undyne screamed, slamming a letter down on Frisk's lap, "I need you to take this to Alphys! It's important!"

Frisk picked up the letter and nodded, not thinking anything of it. Undyne does this quite a lot. It's understandable though. She hates the Hotlands. She always makes Frisk take any letters or items to Alphys. It was not an odd request so like always, Frisk got up and began putting on her coat and boots.

"Be careful out there kid. Don't get COLD FEET!" Sans Joked.

Papyrus let out a huge sigh, "Sans must you? That was terrible! You'll distract the human."

"Ah come on Pap, I've got a skeleTON of these skelePUNS!" He laughed.

Papyrus hid a smile while he turned again, to face Frisk. "Be home soon human, I'm making spaghetti!"

She left the home and closed the door behind her. While making her way towards the Hotlands, she passed by many friendly monsters and humans. The Underground had a much more, friendly atmosphere since the barrier was broken. After some time adjusting, humans and monsters managed to put their differences behind them and become friends. Sometimes they still have issues but otherwise, the world is once again peaceful and happy. 

Soon she reached the Hotlands and Dr. Alphys's lab. She knocked on the door and heard the sound of rustling papers and mechanical clanking stop. There were now footsteps on the floor, coming towards the door. 

"H-Hello?" Dr. Alphys asked from behind the door. 

Frisk knocked again, "it's Frisk." 

"O-Oh why didn't y-you say so?" She asked as she opened the door.

Frisk walked into the lab. There was a distinct smell of ramen noodles wafting through the air, mixed with all sorts of strange other smells of chemicals and who knows what else. Mettaton EX was plugged into the wall in the corner, recharging. 

"Hello darling!" He winked.

"Good evening Mettaton. Looking as good as ever. I saw your performance last night. Spectacular as always." 

"Of course it was dear. Thank you." 

"Anyway, Alphys I have another letter from Undyne," she said as she handed her the letter. 

"O-Oh another l-letter?" She squealed with joy.

Frisk took this time to really look around. It was always interesting seeing what new inventions she had cluttering up her desk. This time the walls had blueprints all over it and a heavy metal machine was lying on the desk. It gave Frisk a terrible feeling. It sent shivers down her spine.

"Alphys? What's this?" 

"T-that? It's um.. it's a device that.. um.. i-it can reset. Y-you know, in case something h-happen to y-you." She went red and avoided eye contact with Frisk.

Frisk couldn't think of anything to say at first. She had never thought about what would happen if she couldn't reset the world. If something went wrong and she couldn't fix it. But she knew it was too dangerous to let others have that power. She sighed: "Alphys that's not safe. That's a lot of power that could be stolen and misused. I think you should reconsider." 

"B-but what if i-it's and emergency?" 

"I don't know Alphys," she shrugged, "I'm just worried."

"So am I F-Frisk. I-I wont tell anyone. No one b-but you and m-me would know. And i-it doesn't work anyway."

After a moment to think, Frisk responded with, "fine. Just make sure no one knows. There are people out there who would use it for all the wrong reasons."

Alphys nodded, "no one will know."

And with that, Frisk was satisfied. She left the lab and began walking home. As she wandered back into Snowdin she noticed that it looked a little different than usual. She didn't know what it was. The lighting? Maybe she was just tired? Whatever it was, something was definitely different. Then she walked into Sans and Papyrus's house. That's when she realized it wasn't just her. Something was wrong.