So... here's my dilemma. I've got characters. I've got a rather vague idea of the plot. However, I'm missing the one crucial thing to bring it all together: THE ITEM. The reason it's all happening. I'm not sure if it's an actual item, or some kind of information, or even both, but god damn do I need it and I can't think of what it might be.
Here's my setup. The story is steampunk, set in an alternate reality Europe. I have two sets of characters who are tentatively connected via THE ITEM.
Set one: Spade, Liv, and Liv's father. Liv is important. She
knows something, something related to THE ITEM. Her father told her this something, because he either works for Mr. X or for Mr. X's competitor (not sure which). Then he's murdered because of this information, shortly after Spade and Liv befriend each other. Spade takes her under his wing and they "disappear."
Set two: Thecla, Hixby, and Mr. X. Thecla is an informant/spy posing as a call girl/prostitute. She works (or at least associates) with Mr. X. Mr. X needs somebody to either transport THE ITEM to someone (but who, and why?), or to keep THE ITEM safe for some amount of time. Thecla finds Hixby, a sky pirate, to do the job.
Then the two sets of characters meet up, when either Thecla or Hixby hires Spade to help them out (with Liv tagging along). At some point they discover that Liv knows much more about THE ITEM than any of them. I'm sure something happens at that point, but until I actually know what THE ITEM is and what Liv knows, it will have to wait.
The only thing I've come up with so far is that, because it's a steampunk world, this is something related to the Industrial Revolution (which never happened, unlike in our world) -- an alternate power source that will revolutionize the world. But even that is pretty vague, and I'm not sure what it would be or even if that's what I want to use. Ideas?