Perhaps the most famous lost city of the ancient world, Atlantis is an enduring symbol of mystery and beauty. Beginning with Plato, people have dedicated their lives to finding the missing continent. But what happened to Atlantis? Are there forces of nature deadly enough to annihilate an entire civilization in an instant? To find out, Olly explores the depths of the Mediterranean Sea, travels to an ancient city swallowed by the earth, treks Europe's most active volcano, and journeys to the site of one of the world's worst disasters. Through dogged reporting, Olly reveals new evidence that could explain the mystery of what really happened to the fabled city of Atlantis.