The Oera Linda Book opens with correspondence from the thirteenth and ninth centuries, detailing how the ancient manuscript was preserved by generations of the Over de Linden family. It tells the story of an ancient Frisian civilization characterized by maritime prowess, advanced commerce, and a pure monotheistic religion centered on the creator spirit Wr-alda and the goddess Frya.
The narrative describes the cataclysmic submergence of Atland, an ancestral land mass west of Jutland, which caused a massive dispersion of the Frisian race. Surviving populations established colonies across Europe, the Mediterranean, and even into India as the Geertmen, interacting with historical figures like Alexander the Great while maintaining their distinct traditions of freedom and equality.
A central theme is the preservation of Frisian laws, known as Frya's Tex, which emphasize self-control, freedom, and the avoidance of tyranny. The text details the governance of the community through citadels overseen by dedicated priestesses and mothers, contrasting their egalitarian society with the authoritarian and idolatrous systems of neighboring peoples influenced by the deceptive priestcraft of Finda and the Magyars.
The chronicle further explains the etymology and historical origins of various classical figures, reinterpreting figures like Minerva and Neptune as ancient Frisian priestesses and sea-kings rather than mythical Greek deities. It records the migrations, the building of pile dwellings in Switzerland, and the eventual decline of Frisian dominance through internal betrayal and external invasions by Gauls and Romans.
Throughout the centuries, successive authors within the family and community add their accounts to the manuscript, documenting the loss of territories, the rise of kings like Friso, and the perpetual struggle against foreign servitude. The text serves as an extensive repository of lost tribal lore, linguistic specimens, and moral injunctions designed to guide future generations toward liberty and truth.
Concluding with dire warnings against the corrupting influence of foreign religions and political oppression, the manuscript urges its readers to remain steadfast in their native language and customs. It envisions a future awakening where the original truths of freedom and justice will eventually reclaim the earth after ages of darkness and deceit.