Equestria hasn't always been the magical place that every pony believes.
For as long as any pony could remember, the three pony tribes have lived in fear and discordance of each other for many, many moons, and has resulted in them separating. Earth ponies live in Maritime Bay, unicorns live in Bridlewood, and pegasi live in Zephyr Heights.
But a local pegasus named Neon Light will become a part of a group of ponies that'll help change that by spreading magic and friendship across the land.
And as time goes on, he'll discover more about himself and what he's capable of.
This story mainly takes place in G5 (including part of the movie, all of Make Your Mark, and a select few Tell Your Tale episodes), but will also include some short chapters that take place in G4.
You'll find out why ;)