On his deathbed, King Aegon IV Targaryen, by some called the unworthy, legitimized all of his bastards, of which there were many. Now his son King Daeron II Targaryen sits on the iron throne, yet whispers of discontent spreads across the kingdoms, from the Dornish marshes to the wall. It is said that King Daeron II was sired by Aemon the Dragonknight. It is whispered that the old King had intended to disinherit him because of this and give the crown to his bastard son, Daemon Blackfyre, some bold tongues speculate that King Aegon IV was murdered before he could do this.
Whatever the case, there are many who would like to believe such rumors to be true. If singers are to believed, Daemon looks the part of a king and is the warrior himself with a sword, and not just any sword. He was given Blackfyre by his father, the Valyrian Steel sword of Targaryen Kings, an admission perhaps, that he is the true heir of King Aegon IV? King Daeron II is not a warrior, and he has further angered the nobles of the realm by importing many Dornish customs and nobles to court.
Should Daemon Blackfyre decide to rise in rebellion to the crown, he will doubtlessly have the support of many houses, enough to pose a serious threat to his half-brother's reign, enough perhaps, to win.
I will be using the 2009 edition of the book (I do not have the Game of Thrones Edition), including errata from the greenronin forum. There will be some house rules as well, those will be detailed in the game forum.
My intention is to have the story be primarily player driven, my preference is to have the world react to what the PC's does. Besides making characters, players will also be required to create neighboring houses, which I will use as the main NPC's of the tale. It will be their agendas and interaction with the PC house that will be the center of attention, with the overarching Blackfyre plot looming in the background and being used to nudge the story along when needed, and provide justification and sparks for many things.
The story will start a few years after the coronation of Daeron II and hopefully we'll see a culmination at the battle of the Redgrass Field. I intend to stick with known canon as much as possible, though I am not adverse to changing it. I will make one major exception though, the winner at Redgrass Field will not be scripted, before any PC intervention is taken into account, there is an equal chance of loyalists and blackfyres winning.