Rainbow Dash, with the help of her friends, has pulled herself back from the brink of madness.
However, it's almost like she even forgot who was by her side, that Pinkie cared about her the most. When Rainbow Dash ignored Pinkie in favor of the God of Chaos, something inside Pinkie... snapped.
Her own soul in turmoil, Pinkamena slowly slips deeper and deeper into a crushing depression...
... For there is a darkness in the hearts of equines, and it calls her name.