If you need some ideas for a plot twist, check out

https://forums.nanowrimo.org/t/adopt-a-plot-twist/2033/1

You have to be a member of NaNo to see the thread, but it's 108 ideas of plot twists...minus the comments where people say they love one and are adopting it. lol

Remember that unlimited people can adopt an idea, so start from #1. And keep an open mind. How could each plot twist work within the framework of your story?

Good luck!