Archaeologists discovered a perfectly preserved 2,400 year old weapon in central China, and a team of archaeologists are exploring a network of subterranean tombs. Then the experts locate something intriguing: an ancient, water-logged casket. Prizing the object open, the group find both a human skeleton and a sealed wooden box contained within. But that isn’t all. Inside that box is a sword – a beautifully crafted instrument that no one has set eyes on for around 2,400 years. And the weapon was once in the possession of one of the country’s important historical figures, as the archaeologists will ultimately find out.