At the beginning of time Divine beings walked the cosmos. Under the watchful eye of God Angels ruled. Until the rebellion. When one such being ends up in Equestria asking for the unthinkable Luna and Celestia will be forced to drastic measures.

Shard gave up his life to save Princess Luna, in his final moments he gave a warning. He shall return a being older than time and devoid of all emotion. upon this mysterious beings return the darkness shall become eternal and a rain of fire shall cleanse his domain of vermin. He has returned and this time no survivors shall remain.

Long ago Princess Luna managed to contain King Sombra in the icy tundra of the north. But he is awake and seeking vengeance. Princess Celestia wants him destroyed, Twilight thinks he can be redeemed and Luna is torn between what used to be her lover now transformed into a corrupted Tyrant hell bent on dominating the land.