Where the Rainbow Ends

Sapphire Star is a pony full of dreams and hope. She wishes to be many things.
One of her dreams is to go to Celestia's school of Magic.

Along the way she discovers many challenges and opportunities. But the only challenge she wants to overcome is her magic.

Most importantly what her cutie mark means.

Will fail to make her dreams come true?

Or will she find the answer at the end of the Rainbow's trail?