Celestia dreams of an age long ago whilst Twilight searches for lore lost since the earliest days of Equestria. Beings that have not walked the earth for aeons begin to stir, preparing to renew an ancient war for the very fate of all Creation.

Equestria prospers and Celestia is content. Her sister has returned, Discord has been brought to heel and the Crystal Empire is restored. A golden age is set to dawn. But an ancient betrayal may yet undo Equestria. War looms across the sea.