Its been 100 years since the last human vanished and left Sans,Napstablook and the Amalgamations alone in the underground. Sans also what Papyrus looks like so whenever he summons the phantom its just a mess. Sans has grown depressed since he lost his friend and his own brother. But one day, YOU, The human gets guided out by muffets spiders left in the ruins. Once you exit the ruins you run into Sans. He is crying I miss everyone..Human please let me kill you..Wait..Maybe we could be friends…