Doctor Whooves being the local and only Timelord of Equestria he deals with threats so that Equestria can remain the happy loving place he wants it to be.
A dalek appears in Equestria - not just any dalek, but the one that had been corrupted by Rose Tyler's DNA. It has a choice of life as a pony, or dying, and finds that it cannot bear to die a second time. Thus begins a strange adventure...
Death sends the Tenth Doctor somewhere he never could have expected. With new friends to make and ancient foes from two universes to fight, only one thing is certain: there's an awful lot of running left to do.
Starlight Glimmer is about to get her revenge on Twilight and her friends, she just has to stop that cyan pegasus from doing her rainbow trick. But before doing so, she receives a visit from a Doctor.