The day Twilight earns her cutie mark, something unexpected happens that no pony saw coming. Twilight undergoes a transformation due to an absurd amount of magic and literally becomes the spirit of magic.
During a friendly visit with the Royal Changeling Brothers, Celestia and Luna's attempt at a spell goes horribly wrong. Now they've become changelings, and the brothers have become ponies!
Dr. Nikolai Volkov, one of the world's most renowned scientist experiments on time travel but ends up dying in an accident. He wakes up as an equinous creature in a strange forest. Embracing his newfound existence, he ventures the unknown.
In a world of humans and ponies, Sheriff Joseph Moore keeps the town of Sagiville safe from all sorts of outlaws and troublemakers. However, when the post is delayed and cattle start to go missing, he must use all of insticts to keep everyone alive.
Mistakes can occur even when you're too advanced for your studies... Twilight learns just that when a magical mishap results in both of her pegasi friends becoming foals.