No humans. In Equestria's past, ponies exist only to serve their creators. One such pony is accidentally released from her mental chains, but how can one mare save herself and her people if she doesn't even know she's a slave?
Princess Twilight decides to reconnect with old friends and ends up exploring a mystery that may end with the destruction of all magic and love in Equestria.
Our hero finds herself in a strange world, and in a strange new form. Maybe this could be a fresh start, you ask? The thing is that she wasn't aware she needed one.