During the 1950s, a corrupt labor union boss and the mob silence all those who witness their shady activities but an honest union member threatens to testify in front of a Senate Committee, thus becoming a murder-target.

Bill Gibson is Little Joe's nemesis and is one of the men who can testify that he saw the labor boss in an incriminating conversation with a known criminal--something that Little Joe denied under oath. Knowing that Cochran and one other witness can bring him down, the crooked labor boss starts on a campaign of terror.