La voix du désert (S)

In the middle of the desert, a message of God, recorded on a magnetic tape, is hidden in the grave of a murdered missionary. The secret powers that dominate the planet send spies to the field to retrieve this document of an inestimable political and financial value. Between three missionaries of the Vatican, two French detectives, a female spy from Pekin Central Office and three agents of the San Francisco Mafia, all tactics are allowed.