Dense jungle canopy has hidden the true scale of ancient Maya cities for centuries, and this film follows archaeologists using LiDAR scanning to strip away the vegetation and map what lies beneath. Teams on the ground in Central America walk through overgrown mounds and plazas that satellite and laser surveys reveal to be the remains of sprawling urban centers, far larger than ground-level exploration ever suggested. Researchers compare old assumptions about scattered ceremonial sites against the new data, which shows dense networks of causeways, farmland, and housing connecting what were once thought to be isolated ruins. Interviews with the scientists driving this work explain how the technology works and what it changes about the picture of Maya civilization at its height. The film moves between jungle fieldwork and the screens where the laser data gets turned into three-dimensional maps, showing the moment abstract point-clouds resolve into the outline of a lost city.