In 1950, farmers in Jutland, an area of central Denmark, stumbled across two bodies in a bog with blackened skin and flame-red hair, preserved in a form of natural mummification. For decades, these preserved ancient people have baffled archaeologists. However, cutting-edge forensic science now allows a 2,000-year-old murder mystery to be unlocked. Using revolutionary new methods, a team of scientists assembled from across the world unearths a shocking story of vengeful gods, dark water and human sacrifice.