Princess Celestia has taken on a new personal student: an unusual young colt named Amethyst Eclipse. When Twilight Sparkle meets Eclipse, he warns her she is fated to "ruin" a magical and mysterious realm that Celestia and Luna have kept a closely guarded secret for centuries—but refuses to tell her more.

Joined by her more scientifically-minded friends, Twilight will try to unravel the mystery before his prediction comes true.

Written for The Writeoff Association's "Under the Sun" contest.