In 1860, Philip Sclater, secretary of the British Zoological Society, noticed something strange: lemur fossils and living species turned up in Madagascar, India, and other landmasses now separated by thousands of miles of ocean. His explanation was a lost continent he called Lemuria, bridging the gap before it supposedly sank. The film uses that puzzle as its entry point into the history of continental drift theory, tracing how naturalists and geologists tried to explain matching fossils and rock formations on separated continents long before Alfred Wegener proposed Pangaea and decades before plate tectonics gave scientists a mechanism that actually worked. Sclater's sunken continent turns out to be a wrong answer to a right question, and the film treats it that way, using it to show how scientific ideas get revised rather than simply proven false. Archival maps, fossil evidence, and the shifting scientific consensus carry the narrative from a discredited nineteenth-century theory toward the modern understanding of how Earth's landmasses have moved and merged over hundreds of millions of years.