When a clash of cultures accidentally leads to Scootaloo getting in a fight with her shy new classmate, it's up her big sis Rainbow Dash (and a garishly-dressed Twilight) to help her realize the importance of getting along with griffons.
When Twilight reveals that using the Elements has left her and her friends incapable of bearing foals, each of them must learn to adapt to this heartbreaking reality.
Rainbow Dash gains leadership of the Wonderbolts. She quickly discovers that whoever coined the term 'the joys of command' must have possessed a twisted sense of humor. Scootaloo arrives with a familiar, cocky attitude, not helping matters.
Withholding their missing father's location, Discord ensnares a pair of siblings in a scheme to free the Sun from Princess Celestia's grasp. Twilight Sparkle and Rainbow Dash are sent in hot pursuit with orders to stop them at all costs.