This work investigates the historical and genealogical claims surrounding the alleged bloodline of Jesus Christ and Mary Magdalene, challenging traditional ecclesiastical narratives. Laurence Gardner, a self-styled historian and genealogist, utilizes a combination of alternative historical research, heraldic studies, and speculative interpretation of ancient texts to argue for the survival of a royal lineage. The book posits that this bloodline, often associated with the Merovingian dynasty, represents a suppressed truth that has been systematically obscured by religious institutions for centuries.

This text functions as a speculative contribution to the alternative history genre, prioritizing fringe theories over mainstream academic consensus. The dense, argumentative style targets readers interested in esoteric interpretations of Christian history and the intersection of myth and genealogy.