There are a set of pregened characters on the design a character thread. They were writing for my hangover city game running this weekend at expo, but you could probably strip out the specifics and have them as a group of paranet characters. The one 'problem' with Fate is that charter gen does take time. My hubby is running old school D&D this weekend - he did his entire character pack in the time it took me to do one laundry character
and they took half the time of the Fate one.
Alternatively throw the request at the thread
As a bare bones you need
1) an excuse for all the characters to be in the same space
2) a threat for them to face
3) a reason for them not to just walk away from the threat and leave it to some one else (easier with Fate than with most games because of ,those wonderful aspects you can compel)
Remember you don't have long so a simple '3 act play' works best. Hook. Exploration. Show down.
Then I always have a rudimentory plot line - which is the way things will pan out if the players DO NOTHING (I don't always write this down but I do have it)
Of course they won't do nothing so anything sketched in there will change in response to their action as the bad guys reformulate their plans as the PCs mess them up. So it pays to keep things fluid. Con games are like schrodingers cat. Even if you provide characters you have no way of knowing the personalities that are going to sit at the table. So being to rigid can be disasterous. You might have planned a deep investigated adventure but if the guys at the table are all 14 year old who want to play pokemon and are here by accident that is not going to work. Conversely if you plan a combat heavy gun festival the the players turn out to be studious types who want to talk through everything with out picking up a dice... You get the point.
The key is to listen to the players and drift the game towards their expectations of play.
That said sitting down at the table with a completely clean sheet leaves you directionless so lay out the following...
1) the hook- the opening event or action that alerts the pcs to The Threat.
2) the exploration stage- a series of smaller events that will give the players the clues they need to identify the bad guys. Hopefully they will come across these as they go looking for more information but if the PCs are particulary slow or "having a blond day". These event CAN FIND THEM.
(I have fond memories of being attacked by possessed tagilatelli during a cthulhu game when we decided to go get lunch rather than track down the bad guy)
Judge to have one for every 30 mins of play. You won't use them all but they will give you something to throw at them. If you have any really key events that are crucial to the plot (Hint have just 1) have this happen on or shortly after your half way time point as a mini climax.
They do not need to encounter all of these but you can use them to lay the trail to...
3) the end game. Big show down opportunity where the PCs get to save the day.
Actually the details of this can usually be pretty vague at the start of the adventure. ("Show down in the hide out, some mooks and the bad guys Igor") Because if the PCs are any good their own speculations will write this for you as you are going along. Something like the phrase "OH god I hope it's not Faries, I hate going into the Nevernever." Can result in a planned show down at the warehouse transforming into the gate way in the warehouse straight into Mabs realm instead.
For me, the arrival of The Big End game is determined more by the time left at the table than the players investigative skills. I set my watch to beep 1 HR before the slot ends then take them there are the next opportunity. No one likes a gmae that runs short - leaves the Playerss feeling cheated. And over running messes up the next slots.1hr usually gives me a 10 mins of Bad guy boasting so they know they are doing the right thing in taking them down, 20-30 min BIG FIGHT and a 15mins of close down and every one leaves the table in time to grab a drink or use the loo before their next game.
edit to add...
my list for this week end to avoid calling all NPC's Bob...
http://dl.dropbox.com/u/14681070/Sues_Names_Cheet_Sheet.pdfJust in case any one else woudl find it useful