When 1 of 2 Foreign Legion officers is killed after witnessing a secret experiment on a death ray (capable of shooting down aircraft) in southern Morocco, the other gets vengeance by infiltrating the organization responsible.

The young Huguette arrives in Camargue to take over the farmhouse and the breeding of bulls from which she has just inherited - Huguette has to face the thefts of horses and bulls by the Romanichels and stand up to the Gardians, who do not appreciate being commanded by a young woman. Fortunately, her neighbor Fred will be there to help her to overcome all these obstacles.