Thanks to a misunderstanding caused by Dash's birthiversary party, Equestria is on the brink of war. Now it's up to Pinkie Pie & Cheese Sandwich to throw the most epic party ever to stop the pending conflict.
Pinkie Pie finds a mysterious note hidden in Boneless the rubber chicken, written for /her/! But, the foreboding message inside doesn't sound at all like the Cheese Sandwich she knows ...