The Doctor finds himself stuck in prison, unable to remember anything he had experienced prior to his awakening. With the help of his diary, enchanted with magic, he tries to piece his life back together, not knowing what might await him at the end.
The time travelers land in the year 10,438 C.E., only to stumble upon a search team that's investigating the wreck of the largest ship in Equestrian history. The trio accompanies them, but the ship enters lockdown, trapping them inside...