Ever since Spike moved to Ponyville with Twilight, he met the most gorgeous, pragmatic, industrious and kind mare there is. It too bad Spike doesn't know how to say this to this crush; Applejack.
Applejack disguises herself as a stallion to serve the Duke Spike, who sends her to woo the Lady Rarity who ends up falling for Applejack, who is really a mare in love with the Duke.