After saving Ponyville from the Cyberponies, the Doctor takes Derpy, Dinky, Vinyl and Octavia on their first adventure through time and space. Their destination; The Splendor, a massive cruise ship travelling the stars and powered by one. But, as usual, it doesn't take long for things to take a turn to the worst as the ship is overtaken by some hostile invaders with very nasty plans for the most amazing cruise ship in the galaxy. The Doctor must save not only his friends and the guests of the ship, but an entire world. The balance of an intergalactic war is on the line, and only the Doctor can save everyone.

No pressure.

The Doctor, a Time Pony, leaves his home-world, Gallopfrey, because, quote, "It's really quite rubbish." He finds a world called Equestria, which is more than a bit strange. For one thing, it's a geocentric system rather than a heliocentric one. He decides to investigate, but finds his query cut short by a visit from some old foes, the Cyberponies. Joined by the wall-eyed Derpy, the psychedelic songstress Vinyl and the refined Octavia, the Doctor must find a way to save his new friends and all of Equestria.