In his fascinating examination of a triple homicide case in Conroe, Texas, Werner Herzog probes the human psyche to explore why people kill-and why a state kills. In intimate conversations with those involved, including 28-year-old death row inmate Michael Perry (who was scheduled to die eight days after his interview with Herzog), the filmmaker achieves what he describes as "a gaze into the abyss of the human soul." Herzog's inquiries also extend to the other convicted killer, Jason Burkett; his father, also incarcerated; a woman who lost both her mother and brother in the crime; as well as a chaplain and former executioner who've been with death row prisoners as they've taken their final breaths. As he's so often done before, Herzog's investigation unveils layers of humanity, making an enlightening trip out of ominous territory.