Upon venturing into the Everfree Forest, Spike finds a creature that nobody can identify. It knows his language, yet it isn't from Equestria. It isn't from this world.

An alien visitor in Ponyville is something to be kept secret. Is a secret a burden Spike can't handle? How long will this creature last in Equestria? Why has it come here in the first place?

But most importantly, why won't it leave?