Who would have known that the pony Twilight viewed as a second mom was actually her birth-mother? Now the secret is out, relations are strained, and life is about to get extremely complicated for Twilight. At least she has Luna, right?
On behalf of her sister, Princess Luna tries to elevate the studies of her new student, Twilight Sparkle. However, when their plans backfire, they find themselves in a new world where magic is lost, and then have to survive the turmoil in its place.
Princess Luna and Twilight Sparkle are enjoying the wonders of Camping in the Great out of of doors, or they would if only the rain would stop. What are two bored mares going to do to pass the time.
Celestia asks Luna to teach Twilight dark magic. Twilight must pass Luna's class in order to graduate. As Luna develops feelings for her student, Twilight questions which princess she really wants to serve and protect.
Twilight recieves rather late invitation from Princess Celestia for the first "Winter Solstice" celebration for Princess Luna. And while staying there, something is going to change her life...
Twilight Sparkle is called away to tend to Luna when she falls ill. As Luna grows sicker and Twilight more determined to help the younger princess, she begins to uncover dark secrets about the elements, the alicorns, and her own past.