The Great Pyramid of Giza anchors this film's central claim: that its proportions, orientation, and placement encode mathematical knowledge, including an approximation of pi, that conventional Egyptology cannot explain by 2500 BC. Filmmakers Jacques Grimault and Patrice Pooyard build their case through interviews with engineers, historians, and independent researchers, alongside aerial footage of Giza, comparative shots of monuments from Mexico to Easter Island, and diagrams laying out precise measurements and alignments. The film argues that similar geometric signatures turn up in structures separated by oceans and thousands of years, and asks who or what could have transmitted that knowledge. Egyptologists who reject the fringe reading are largely absent, so the case is presented mostly through its advocates. What holds attention is the sheer accumulation of measurements and cross-continental comparisons, pushed toward the conclusion that a lost, advanced civilization preceded recorded history. Whether or not the math convinces you, the film lays out its argument in full, scene by scene, rather than gesturing at mystery.