What if Celestia had a son? What if his existance was kept a secret? What might happen if he decided to live his life? What would happen if the elements of harmony dicover his existance?

Blackheart is the son of princess Celestia. After being kept a secret for years and in an attempt to stop reoccurring dreams of a filly from his past, he ventures forward around equestria without his mother's consent, to discover just who is prince Blackheart and why is he so important?

By the way this is my first story, so I'll try my best to make it good and grammered correctly, constructive criticism is appreciated :)