You and Applejack are best friends since childhood, even though your families have a different status. Yours runs hotels and hers runs an apple farm.
Without you realizing even though Applejack earned the Element of Honesty, there is something she has been keeping a secret from you. With Equestrian magic getting involve again with your lives, all of this will now test on how strong your relationship will still be with her.

Fourth Entry of the MLP Equestria Girls: Guardians

Note: There is a reason for the extra warning. You'll find out once you guys read Applejack's side of the story series.