I came up with the idea when I was still under the idea that I was going to make movies on one of the five-acre wooded properties that my family owned. I envisioned a semi-truck accident that threatens to expose a company who publicly works for the government, but secretly operates an underground railroad to get political dissidents out of the country. Normally, they use a pipeline between the US and Canada, but a recent problem has forced them to use trucks instead.
I had several side plots running through this story (which has yet to be written). In one, a young couple associated with the company but who don't know about the Underground hijack a truck to elope (or joyride, or something), not knowing that they are carrying human cargo ... which leads to a chase ... which leads to the accident ... which leads to the main conflict.
A second one deals with the leader of one of the Underground's extraction teams. Specifically ordered to retreat from a conflict, he disobeys orders in order to complete his original mission. In doing so, he is forced to kill a government team that was sent to stop him only to discover that he had killed ... himself. It turns out that he was part of a government project used to clone the best soldiers ... and he's one of the clones.
The final major plotline follows one of the Underground's leaders who is struggling with the fact that they are keeping their existence from the general public. Even when open conflicts erupt in the country, they are covered-up by false news stories about religious fanatics and public shooting sprees (this idea developed after Waco, but before Columbine. I'm now a little concerned about people taking it as truth). This particular character ends up having to sacrifice himself to somehow save one (or both) of the above plotlines.
I think that this is a story that could sell, especially in our current political climate, but I am a little concerned about the message that it would be sending. I am also a little concerned about the amount of research that this kind of story would need (as I am for any story set in the real world as opposed to a world that I create). Still, I like some of the plotlines and would like to see how they develop.