The sequel to These Dreams and the three are being pursed by a pony from Discord's past who wants him gone forever and will stop at nothing to have it happen, even it means hurting the family if so.
Twilight is deemed insane after Tirek blasted Discord to bits and she sees him a week later. Now he says he is alive in her dreams, but can she believe him when he torments her when she's awake and nopony else can see him?