Much has changed, both figuratively and literally, since the jovial changeling Habeas Brittle and the staunch earth pony Persica saw past the differences of the other and found something more, even through the struggles they endured. But as some time goes by and their affinity for the other reaches an apex, they find out that the unexpected and unpredictable has not yet abandoned their worries.
Both look to the truly unforeseeable future, one driven to it by fear and force, and the other hopeful but anxious for its inevitable coming beyond measure. And as fate would have it, they aren't the only ones who are discovering terrible troubles in dire need of being overcome.