Benjamin is part Aborigine, but nightmares from the past cause him to disown his heritage. Unfortunately, he feels no more at home in the Western world and so struggles to know his identity. Benjamin seeks to hide from both worlds in his workshop where he ekes out a living as a wood-turner. However, an attempt on his life propels him into a mysterious affair surrounding the fabled "mahogany ship" sighted by early white settlers near Warrnambool in Australia. Felicity, a historian, is seeking to rebuild her life in the nearby town of Port Fairy after a messy divorce. The discovery of the "Atlantis stone" whilst scuba diving results in her joining Benjamin in an adventure that takes them overseas to the ancient city of Cagliari in Sardinia. An anthropologist dying of cancer and an ex-SAS soldier with post-traumatic stress, join Benjamin and Felicity in an adventure that centres on a medieval treaty, a hunger for gold... and, of course, the Atlantis stone.