After a successful career as a Marine Corps officer, Wade Stuart, an ATF special agent, finds himself working undercover in his home territory, the Mississippi Delta, infiltrating a militia unit with lofty goals. When Stuart uncovers a plot to assassinate the governor of Mississippi and take over the state as part of a people’s revolution, Washington plans to send in the 2nd Marine Division to attack the militia. Stuart sees a bloodbath coming, begs for more time to quash the plan, but the president sees this as a good opportunity to set an example. Isolated and unsure of the decision out of Washington, Stuart must race to shut down the militia before the military arrives. Enemy Within rushes forward at breakneck speed, and only one man can stop these domestic terrorists...Wade Stuart!