Rich, intelligent and handsome, Zadig, a model of wisdom and virtue, has everything to be happy! However, fate decided otherwise ... Betrayed by his first wife, jealous of unscrupulous courtiers and finally repudiated by King Moabdar, the young man must flee Babylon, leaving behind the one he loves, the beautiful queen Astarte. But his disappointments do not end there. At the end of his misadventures, will Zadig manage to find happiness?