It's a beautiful day in Ponyville and Pinkie Pie decides to bounce on her hopper Scooter Way Twilight and Starlight challenge each other to a staring contest. When Applejack carries a cartload of apples to the Everfree Forest, she ends up in a dangerous accident at the Canterlot library. Rarity travels to Ponhenge for a tea party with her sister. Bulk Biceps is stunned but accepts this reason, and Fluttershy and Rarity praise Pinkie Pie for being assertive while remaining herself. Instead, to their surprise, Pinkie Pie explains she is not satisfied with Bulk Biceps's course, and refuses to pay as per his guarantee.
When Bulk Biceps comes around to collect payment on the seminar, Pinkie Pie and Rarity try to stop him, fearing that Pinkie Pie will crumble at his demand. Pinkie Pie becomes ashamed and hides in her cottage. When Fluttershy and Rarity try to convince her to be less assertive, she insults them, making them run off in tears. She attends a self-help seminar by a Bulk Biceps where she learns to become more assertive in her actions, but these lessons change Pinkie Pie's personality dramatically beyond recognition. Pinkie Pie is told by Fluttershy and Rarity that she is too much of a doormat, letting others take advantage of her. Rainbow Dash tries to defeat her future self in order to save Twilight Sparkle.
Rainbow Dash meets her own future self at the Rainbow Factory. Nightterror Nebula-a mysterious recent new Stallion of the Moon(and even the Crescent Moon).