Things couldn't possibly get any worse for Rainbow Dash. Her job is falling apart, she's convinced that she's made her friends hate her, and even her dream of some day joining the Wonderbolts is in peril. While things are looking pretty bleak for Ponyville's coolest pegasus, her best friend and kinda-sorta fillyfriend Pinkie Pie is determined to whatever it takes to help her, and she's not going to quit until she can put a smile back on Rainbow Dash's face.
This is a side-story of "The Life and Times of a Winning Pony" which occurs after the events of Chapter Ten of that story.