What began as a controversial discovery - evidence that cocaine may have reached Ancient Egypt - was like the first crack in a sealed tomb. As scientists began to prise it open, long-held assumptions about the Ancient World started to crumble.

Following the trail from the museums of Munich and Egypt to laboratories in England, embark on a journey through disputed evidence, competing theories and the scholars determined to uncover what lies beneath. Across disciplines and continents, voices converge and collide, as scientists, historians, botanists and archaeologists sift through fragments, from the Victorians to the Vikings, from ancient remains to modern laboratories. What first appeared to be an isolated anomaly begins to expose the possibility of something far larger: ancient transatlantic and transpacific trade networks once dismissed as impossible.

This film celebrates discovery as live-wire through which history, science and human certainty are brought back into the light, examined, contested and, sometimes, forced to be reburied in a new form.