After over 4,000 years of ruling Equestria, Supreme Commander Colgate has decided to step down and allow Scootaloo, her second in command, to take over. Not long after learning this, Scootaloo begins envisioning Equestria in a different light.
With the world at peace, Colgate is unable to adjust. She becomes frustrated and goes into the Everfree Forest where she finds a portal. She goes through this portal and the inhabitants in this other land help her get out of her funk.
Colgate is bored, very bored. She decides to journey into the Everfree Forest and discovers a portal to a different world from an earlier time. She discovers something that not only she, but her sister would want.