Graham Hancock travels to the great monuments of the ancient world, from the Sphinx and pyramids of Egypt to megalithic sites scattered across the globe, asking whether they are the work of a forgotten civilization far older than mainstream archaeology allows. He walks the weathered flanks of the Sphinx enclosure, pointing to erosion patterns he argues were carved by heavy rainfall thousands of years before Egypt's conventional founding date, and compares layouts and astronomical alignments across continents to build a case for contact between ancient peoples long before recorded history says it happened. Geologists, Egyptologists, and independent researchers appear on camera to back or challenge his claims, and the film keeps returning to a simple provocation: what if the timeline taught in textbooks is wrong? It is fringe archaeology delivered with real footage of real sites, letting viewers weigh Hancock's interpretations against the establishment view rather than presenting either as settled fact.