In the months following the events of Part 2, Princess Luna comes face to face with a terrifying reality: Nightmare Moon is feeding off of her own self-loathing and shame, gowing ever more powerful. Now, more than ever, Luna needs forgiveness in order for her to let go of her shame, and prevent Nightmare Moon from making a comeback. To do so, Luna faces the immense challenge of overcoming her fear and asking for the Warden's forgiveness for enabling Nightmare Moon to take his wife and daughter away centuries ago...

But she is not optimistic. She knows the odds of him actually forgiving her are low. But faced with the prospect of Nightmare Moon's return, she must step forward, and face the consequences of her most traumatic mistake...

While a handful of references of suicide/self harm are present, nopony kills themselves in this story.