From all over Europe, even from behind the Iron Curtain, gypsies make an annual pilgrimage to the shrine of their patron saint in Provence. But at this year's gathering, people are mysteriously dying. Intrepid sleuths Cecile Dubois and Neil Bowman join the caravan in order to uncover the truth behind the deaths, in the process revealing an international plot that the sinister Gaiuse Strome will stop at nothing to keep secret.