It's set six years after the events of Sozin's Comet, and involves two underground organizations - the Jade Shark, a group that hates benders and wants to eradicate all benders, and the Original People of the Flame, who want to return to the "old ways" of the Fire Nation during its high period of conquest.
There are still some canon characters that need players, and there're always people looking for an RP. Check it out?
(If this shouldn't go here, just remove it. I'm not sure how non-LJ roleplays and blatant plugs are accepted here)