Thousands of hiker's traverse the Appalachian Trail. For most, it's an enjoyable experience. A chance to reconnect with nature, meet interesting people and get a great workout. For some, it can be a nightmare. Multiple women have been raped, ravaged and terrorized, along a 40 miles stretch, in the Great Smoky Mountains in Tennessee. Authorities are stumped. Unable to find the perpetrator, he strikes again. Eric Lance has a sickness. His heart desires...