Marines are being murdered...
...and it takes someone outside the government to fix the problem.
It's a race against the clock to dismantle a group that's been in place for years. They're well-funded, too and armed with weapons they shouldn't have. Authorities are stymied. Ian and Jenny Bragg are not so constrained.
It's supposed to be a single target. What if the target may not be the target at all, but a pipeline to those who deserve what...