Twilight messes up badly while the rehearsal wedding was happening. So badly, her brother, her best friends, and most of all, her mentor leave her.

And Twilight is devastated.

Blinded by heartbreak, shock, and even anger, Twilight wonders if the ponies she thought cared about her really do care about her. Luckily, before she could slip, a friend arrives and gives her a little help.