Starlight Glimmer finally graduates from Twilight's program, and is told to find a student of her own! Twilight recommends going to a new planet, inhabited by "He-you-mains". She tries to make a friend, but finds something more!
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.
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.