Celestia has run into the volcanic mountains, afraid and confused; her fire powers have gotten out of control.
Her younger sister, Luna, is determined, though, and treks up the large volcano to convince her sister to return to their kingdom and stop the raging sun storm that Celestia has unintentionally caused, before ponies are burned to death.
Inspired by Disney's "Frozen".
I like the Frozen references.
hm... I will read this
Wow.
Cool one-shot.
Celestia sounded like Idina Menzel in my head.