From all over Europe, even from behind the Iron Curtain, gypsies make an annual pilgrimage to the holy shrine of their patron saint in Provence. But something is different about this year's gathering; this year people are dying.

Cecile Dubois and Neil Bowman are also in Provence, and discover that someone is financing the gypsies. What is the secret they are so determined to hide? As they follow the caravan, Bowman and Cecile come too close to it for safety, and before long are running for their lives.