Over the Edge

Off-duty United States Secret Service agent H. Hunter Mahoy is wounded while landing a gunfire-stricken jumbo jetliner at Miami International Airport. The surgeon who operates on him finds a suspicious fragment in his left shoulder and queries him as to its origin. Hunter is clueless.

His coworker, Agent Charles Minsk, takes the fragment to a private lab in Washington DC, where he soon learns that it's a highly miniaturized tracking device--or was, before it was struck by a bullet. The lab o...