A young musician finds himself before Princess Celestia and Princess Luna, but he is no longer human, nor on earth. He is a unicorn and is now in Equestria! Although, maybe this is his chance to finally live the life he has dreamed of for years!

To live life as a musician.
To share his music with the world.
To watch and hear ponies enjoy his songs and even relate maybe!
It's all he ever wanted... but is it really that simple.

First, there is the issue of a certain somepony's inability to stand/do anything.