Ever wonder why Granny Smith gives Filthy Rich those 100 jars of zap apple jam? Or who her husband is? Or why zebras are treated differently in Ponyville? All the answers are in Granny Smith's private scrapbook.
Applejack finds out there may be another branch of her family in Whinnieapolis on the other side of Equestria, so she sets off on the longest journey of her life to find out.