Two years have passed ever since BFFLs Maya & Zaria accidentally transported themselves to the mystical world of Equestria. Now, at older ages, they find themselves being transported again—but this time it's no accident.

Princess Celestia needs the girls' help, for the fabrics of time of time aren't healing; they're ripping to shreds every few seconds! Will the girls be able to save the world? What will they encounter on the way? And more importantly: what will their former "inner ponies" say about this?