The Fiercest Enemy

In rural Indiana, the underground mines that once held coal and iron ore have become killing grounds. In two counties, five corpses have been discovered. Their deaths appear accidental, from drowning or suffocating in flooded and abandoned mines. But local authorities, including Chief Shaunda Lynch, have uncovered evidence suggesting they've all been murdered.

Assigned to the case as Federal Agents, Detectives Jack Murphy and Liddell Blanchard take charge of the investig