The Reapers are invading Equestria, intent upon destroying and enslaving the upstart ponies before they can affect the rest of the cycle. Unfortunately for them, Luna stands in their way.
Starlight Glimmer has returned to the present to find herself a member of the Mane 7. She is now a bearer of an element of harmony, and has a husband—her soulmate, Sunburst. So, what happens the morning after?
A Reaper dreadnaught confronts Celestia, intent upon indoctrinating the leadership of the ponies. Said Reaper quickly learns exactly why Celestia has earned the title Unconquered.