The girls have recovered from their mishap with Bon-Bon (even if she hasn't) and are ready to tackle new challenges. In an adventure where Dash is drunk, Rarity is furious, and Scoot cries (totally not related) the girls will meet a new pony, learn something about themselves, and find out Applebloom's secret hatred for a certain pet. There's more of course, but too many plot points have already been pointed out.