Herculaneum sat closer to Vesuvius than Pompeii and vanished under a different kind of destruction, buried in volcanic mud that carbonized wood, food, and even fabric instead of burying it in ash. Professor Andrew Wallace-Hadrill leads a forensic investigation built around the discovery of twelve arched vaults near the ancient shoreline, chambers where residents fled the eruption and where their remains stayed preserved for nearly two thousand years. Scientists work through the vaults bone by bone, reading diet, health, and status from skeletons, and aerial photography maps the town's layout from above, showing how streets, houses, and the harbor fit together. The film gets specific in ways Pompeii rarely allows: what people ate, how they cooked it, the wood furniture that survived as carbonized shapes rather than voids. Wallace-Hadrill treats the vaults as a single frozen moment, the last minutes of a working port town, and lets the forensic evidence rather than narration carry most of the argument about who these people were.