Central Irelands waterlogged landscape is no ordinary ground. Here, the moist earth halts decomposition, perfectly preserving stunning evidence of brutal ritualistic killings -- corpses from the prehistoric Iron Age, over 2,000 years ago. Make no mistake, these are not skeletons or mummies, but the soft tissue and remains of people trapped in time. The perpetrators of this ancient violence are well beyond the reach of law, but there are still many fascinating secrets their victims will share if only modern science knows how to ask. NOVA is granted exclusive access to the investigation of two recently unearthed and exceedingly rare bog bodies. Enter the lab with the experts as they push archaeological forensics to its limits, aiming to enlighten how these people lived and establish how and why they died.