A group of dedicated conservationists set out to save the huge sandstone temple of Angkor Wat in Cambodia. The religious monument is visited by a large number of tourists every year, but as the infrastructure of the country begins to change it is putting the ruins under threat. The team are also joined by a group of researchers who hope to unearth new clues on the site.The magnificent temples of Angkor were mysteriously abandoned for hundreds of years. Now, the largest religious monument on earth is at risk of being lost again. It will take a team effort to restore this legendary world heritage site to its former glory. Researchers are discovering new clues about what went wrong in the past, while locals are fighting to save their heritage for the future.