This story is a sequel to The Pony Ghostbusters
Four months have passed since the Ghostbusters mission in Equestria. Now they must return to protect it from the ghost of Nightmare Moon who still desires to make nighttime eternal in the land. Will the boys and and ponies defeat this ghostly monster, or will all of Equestria fall into eternal darkness?
Continuation from The Pony Ghostbusters If you've not read it, then you will not understand this one.