Tempest Shadow was forgiven, and assigned to Twilight Sparkle's personal guard. Another villain reformed, another new friend for Equestria.
Another villain who didn't face justice.
The Noble Court has finally had enough, and has gathered together to form an inquiry into Celestia's reasoning for letting so many villains off the hook. The time has come to have the Princess of the Sun reveal why she's let so many of Equestria's most dangerous threats off of the hook.
They have to be careful, as Celestia has hooks of her own.