The Cursed Apocalypse

In the world, there are curses. You may wonder how these curses came to life but it's hard to explain. Back in 2011, two scientists were creating a cure for cancer but ended up messing it up. Which resulted in one of the scientists to become cursed as a spirit. The scientists had two daughters, but since one of them were a curse, they ended up affecting their oldest. But what they didn't know, is that their other daughter would end up saving their whole entire world one day....