Leyton takes us through the underbelly of humanity. In search of "the landscape of murder," from lovers' quarrels and drunken fights to coldly calculated mass killings. A Jack-the-Ripper tour of London takes us to convicted killers on death row. We also visit a stretch of Nevada desert notorious as a dumping ground for murder victims. Gradually, we come to understand some of the reasons that people kill...and learn that the person who shares our bed may pose a far greater threat to our lives than a stranger.