The 9th Doctor struggles to pull his TARDIS off of the dalek ship and loses control, flying through an inconvienently placed ripple in time. He crashlands in a kingdom, well, more a Princessdom, full of ponies, unicorns, pegasi, and unicorn-pony-pegasus creatures. When the unicorn Twilight Sparkle takes the newly regenerated Doctor in her care to heal, her life changes forever, as the Doctor thrusts her into a world she could never have imagined possible. And she must help the Doctor get back to his universe before the ripple in time closes.