When somepony else's world is at your hooves, what do you do with it? In times of need, we all need somepony to lean on, but who is that somepony's somepony, and so on?

From the Griffon Kingdom, a plague previously unknown to Ponykind is imported. Within five days, they say, the victim is either fine or dead. How will the Mane 6 (plus Midnight!) cope with Apple Bloom's infection? Will Twilight manage to find the cure in time and stop this madness? Only one way to find out.

Note please: The following stories are in the same universe; An unknown sensation, Splitting aMid the Night, To Jack a Rainbow, Two of a kind.
In addition, Strength and Perception take place in a parallel universe to that one, where things are almost the same, but not quite.