There is a reward out for information leading to the arrest of, blah blah blah. It is a very big reward, life changing.
Our guy know who did it, who ordered it, and that numerous feds and cops are in on it.
He figures if he comes forward in the normal way he is more likely to be taken out than rewarded.
We follow his witness, his hiding, his desire for the reward, his fear, his hero motivation, and his ingenuity to find the most trustworthy higher-up possible to get a result.
A street hustler having to learn the hierarchy of bureaucracy on the run. He makes wrong moves which gets bad hombres on his tail. And the person he ends up trusting, a desk jockey, needs to find skills they didn’t know they had.