help needed with a plot regarding the Black Network

[Gundark]

we have had a FR campaign on rest for awhile. However we are likely to be picking it up soon. We left off in the nation of Cormyr. What I was thinking is that the players learn of a plot to kill the infant king of cormyr by the Black network. The fire knives are assisting in this plot as assasins. The Black network is doing this because it will cause chaos in the realm and can cause nobles that are allied by the black network to gain more power. The black network also has a noble in their ranks who could try to rally for the throne if the child ruler and his protectorate are slain. Basically I'm looking for any ideas for this plot. The PCs are around 6th level if that's any help for thinking of encounters.
Thanks ahead of time

 

[Psychotic Jim]

Well, since the Fire Knives want to kill ALL of Cormyr's nobitlity, how about the assassins try to pin the blame for the murder attempt on a rival noble family? The nobility become paranoid and start fighting amongst themselves, and the Fire Knives just have to fan the flames a little bit and cover their tracks to make sure all the rival families wipe each other out.