A strange plague has spread across Equestria. A plague related to the Tantabus, who was assumed by many to be vanquished. The plague haunts the dreams of several reformed villains. Dreams that have to do with their villainous past and the consequences they face.

The dreams continue for days. Even Princess Luna, a victim, isn’t powerful enough to stop it on her own. The princess is accompanied by the other victims of the lingering Tantabus to set off in an unknown forest filled with dangers and secrets. The princess, alongside Discord, Trixie, Sunset, Starlight, and Stygian, will be tested, and only the strongest of wits will prevail.