The paramilitary security force at the U.S. DOE Y-12 National Security Complex in Oak Ridge, Tennessee, is trained to prevent illegal access to nuclear bomb grade material in the new Highly Enriched Uranium Materials Facility. Signs warn that the use of deadly force is authorized in the 'kill' zone. A bold team of intruders surprise security at night and trigger events that shatter the reputation of the 'Secret City' that was key to the WWII Manhattan Project. Old-school detective work blends with modern forensic technology as investigators race across the state in pursuit of the truth.
