A Doctor Who/My Little Pony crossover story. The Doctor awakes to find that he has regenerated into an unfamiliar body, and his TARDIS is stranded in a strange universe without power. To get back on his feet (or more accurately, his hooves), he'll need the help of the ponies he meets there, including the friendly but absent-minded Derpy Hooves and the irritable Golden Harvest. But all is not well in Ponyville, and the seemingly serene town hides a secret that could put all of their lives in jeopardy.