After being abandoned by her friends, Sunset Shimmer wanders the steets alone, with no hope left, she gives up, only to be saved at the last second. Meanwhile her friends are trying to find her, and apologize for what they've done.
A part of Sunset wanted to die the night of the Fall Formal. In a way she succeeded. There's a reason everyone says Sunset is like a completely different person afterwards.
Rainbow stumbling across Pinkie drinking went a lot better than Pinkie could have hoped, what she didn't know is what would come from it. She thought she was the only one of her friends that was miserable and wearing a mask, she was wrong.
Despite that everypony has forgiven her, Luna still lives with the guilt of her actions and it eventually builds up too much for her to live with. Worse, guilt is only part of it.
"You probably thought the pain would disappear with you, but it didn't. It just passed on to someone else." — Twilight Sparkle returns to the human world following her conversation with Sunset. Sequel to Last Light.
Lost her magic. Kicked out by Aria and Adagio. Going it alone. Not a good week for Sonata Dusk. Lucky for her, a certain someone decides to give her a second chance.