things just keep getting worse by time since Betty's arrival. Chara is still trying to save his brother asriel from the Hate. Toriel is depressed after hurting Asgore by accident out of rage and regrets. Undyne Is fighting the giant kumuling with the help of the AMD team. And you....you are facing the big threat itself, Betty, but you're not alone, you are with the skeleton family, papyrus, surprisingly sans, and of course, Dr. Gaster. everything was going well until... Gaster lost control of his rage after sans got killed again but this time permanently, and out of his rage he managed to kill Betty but without sacrificing half of your soul even if it meant to lose your trust on Gaster. But the peace didn't last for too long, you thought that Betty was finally gone, but it wasn't over, as the Hate transformed into another vessel, ...which is Gaster!