Celestia believes that only true love can vanquish the darkness that has begun to corrupt Luna's heart. Luna, beset by her troubled mind, is approached by a lowly earth pony who immediately falls in love with her and tries to save her from herself.
Ponykind has lived in a society melded around its monarchy's divinity. That image begins to unravel as a stallion unwittingly stumbles upon living proof of a long forgotten legend that may bring the monarchy crashing down.
A young unicorn mare has everything she could ever want. The charming husband and a lavish home. Yet her love and devotion to him is tested in the form of societal expectations and a city ravaged by sudden and violent change.