So carrying on where I left it off someone comes up to the castle and says that he has a solution so asgore is delighted problem solved done and done but asgore doesn't know this isn't ANYTHING near helping the underground. Its this dark blue liquid and is inedible but the guys who "helping" says it's edible and asgore believes him so he asks him if he has anymore and he does but once this became open to the public chaos formed it mutated people into these icy gooey creatures and they start putting it on people to so everyone stars running , hiding and fighting back but in the end it was no use the running got captured the hid got found and the fighters loss then you come in/Frisk they try to find the mastermind behind this and put a end to all this chaos.

(Btw there are survivors and you get a companion but only for sometime)