Webster is a military man serving in the United States Army and conducting very tough missions. That is why, for him, his family is the most important thing, which is what gives him stability when he returns home.
In the tape we see that he returns from one of his periods of service and when he goes to see his brother he finds that he has been brutally murdered. That shatters Webster, who immediately thinks of revenge.
That is why he begins to investigate on his own, taking advantage of all the knowledge he has acquired in the army. Little by little he digs and finds clues to the murder of his brother.
What he discovers does not like anything, as it seems that the United States Government itself is involved in the murder, so finding the guilty will be nothing short of impossible. If you find him, judging him will be even more complicated.