When the seasons start changing beyond the control of weather teams not even the the princesses or elements of harmony can fix it. But this isn't the first time its happened, and only a certain re-formed Chaos lord and changeling queen know who to ask.
But will this guardian let go of the past? What happened all those decades ago? And what does one draconequus and Changeling Queen have to do with it?. Can they save Equestria or will it be the end of everything everypony knows.