This story is silly, quick and easy to follow. I am not responsible for any missing brain cells when you finish reading it.
A Borg Drone is driven through a time portal. However, it is lurched away from its fellow drones in the process. Somehow in a place inhabited by inferior lifeforms. Or so it scans say so.
The drone pops into existence outside the city of Canterlot while both princesses are away on a diplomatic trip to the Zebra nations. The result is quite interesting.