On the isle of Mauritius at the turn of the century the young Alexis L'Etang enjoys an idyllic existence with his parents and beloved sister - sampling the pleasures of privilege, exploring the onstellations and tropical flora, and dreaming of treasure buried long ago by the Unknown Corsair. But with his father's death, Alexis must leave his childhood paradise and enter the harsh world of privation and shame.Years later, Alexis has become obsessed with the idea of finding the Corsair's treasure; and through it, the lost magic and opulence of his youth. He abandons job and family, setting off on a quest that will take him from the remote tropical islands to the hell of the First World War, and from a love affair with the mysterious Ouma to a momentous confrontation with the search that has consumed his life.