Luna and Celestia hatch a plan to fake Celestia's death so Luna can understand what Celestia went through, and Celestia ends up falling in love with a stallion in Ponyville.
Jack's been ghosting Equestria for nearly fifty years now and decides to see this new princess, and finally learning about his condition. Only except, Flurry is the only one who can see him.
Having the chance to see the whole world for what it is has made my life a wreck, but now I will travel to a place too dangerous for everypony, even Celestia, to go to.