Shortly after the death of Charlemagne, a girl named Johanna von Ingelheim, Johanna Wokalek, is born in Ingelheim am Rhein. She grows up under the stern rule of her father, a village priest, Iain Glen, who governs his household with a firm hand. His Saxon wife, meanwhile, secretly clings to the old ways and worships the pagan god Wotan, a tension that threads through the household even as Johanna blossoms into a remarkably articulate mind. From an early age she devours the Bible and other scriptures, training her voice to argue and question in ways that even her father’s iron discipline cannot quash. The family’s order is punctured when Johanna’s eldest brother dies unexpectedly, and her father contemplates sending his second son Johannes to a cathedral school in Dorestad. Yet fate takes a sharper turn when a visiting scholar, the physician Aesculapius, arrives with tales of learning beyond their town. Johanna’s curiosity wins out over her father’s resistance, and she begins studying under Aesculapius, who broadens her horizons with literature such as Homer’s Odyssey, revealing to her a world of ideas that her father never imagined.
When a bishop dispatches a messenger to bring Johanna to the cathedral school, her father claims there was a mistake and lets the bishop’s man ride away with his other son. That night Johanna flees, joining her brother as they flee toward Dorestad. The journey is fraught with danger, and they arrive to find that the bishop is astonished by Johanna’s forceful, maturing voice. The teacher Odo reluctantly admits her to his class, but it is Count Gerold, David Wenham, who first sees her not merely as a prodigy but as a kindred spirit. Gerold brings her into his home, and a deep, complicated bond forms as he supports her growing intellect. Their alliance, rooted in admiration and empathy, evolves into a tender, forbidden love, complicating Johanna’s path as she outgrows the boundaries of her role as a student and elevates herself into a figure who could surpass the limits set by tradition and politics.
Meanwhile, power and intrigue swirl around the two key figures who influence Johanna’s fate: Eusthasius and Anastasius, Richard van Weyden and Anatole Taubman. Eusthasius, a schemer in the background, quietly shapes the currents of church and state, while Anastasius plots to elevate himself by removing Sergius II from the papal line. In the city’s corridors of power, the formidable Richilde, Claudia Michelsen, uses her position to maneuver events in favor of her own ambitions and against Johanna, pressing for a marriage that would separate the young scholar from the man who has come to care for her.
Johanna’s ascent is spectacular yet perilous. Disguised in male garb as "Brother Johannes Anglicus," she travels through the Benedictine Fulda monastery, where she briefly hides her identity while a fever threatens to expose her. Her father’s visit to the monastery—to confirm the truth—ends in tragedy when he dies of a stroke after discovering who she truly is. A wise old monk recognizes her gender long before the fever hits, and she escapes through the monastery’s walls, finding shelter with Arn, the son of a woman she had helped years earlier. Arn, though he cannot protect her openly, makes her a tutor to his daughter Arnalda, and Johanna’s talents continue to prosper in quiet, steadfast hiddenness.
With the world still denying her a rightful place, Johanna makes a bold choice: she resumes her male disguise and sets out on a pilgrimage to Rome, determined to become a Medicus and to use her knowledge to treat those in need. In Rome she earns a fearsome reputation for her herbal remedies, and soon the papal seats open to her. Pope Sergius II, John Goodman, recognizes her gifts, appointing her as his personal physician and eventually as Nomenclator, a trusted figure close to the pope. The pope’s faith in her abilities and her own testing of faith mirror the turbulent political climate in which she must navigate.
Lothair I’s army, led by the loyalists around his circle, pushes north with an eye on Sergius’s papacy. Lothair’s ally Anastasius is actively plotting to murder Sergius, removing the pope who stands in his way and hoping to enthrone himself. Yet the Roman people, stirred by Johanna’s authority and compassion, choose her as pope by acclamation—an unprecedented moment where faith and law bend around a single, formidable woman. As pope, she enacts a vision of a charitable church, championing women and children and appointing Gerold, David Wenham, as head of the papal army, a position that consolidates their bond even as the state’s menacing forces close in on them.
Her pontificate, however, is not without danger. Johanna becomes pregnant, a fact that intensifies the conspiracy around her. She struggles to delay birth until after Easter, but the conspirators, led by Anastasius, strike during the Easter procession. Gerold is killed in the attack, and Johanna collapses, delivering a child before dying in childbirth. The murder of the papal couple’s hopes leaves Anastasius to ascend briefly before the people expel him, exiling him to a monastery, where he retorts by drafting the Liber Pontificalis—omitting Johanna’s name from the list of popes, a final act of revenge that echoes through history.
Decades later, the truth of Johanna’s life is unearthed by Bishop Arnaldo, who reveals himself to be Arnalda, the daughter of Arn. The tale, once whispered as legend, becomes a chronology of a life that broke through the rigid boundaries of gender and power, leaving a lasting mark on both church and history.
In this sweeping historical drama, the clashes between faith, gender, and state power are rendered with a quiet yet unyielding intensity. The film invites audiences to witness a figure who navigates every obstacle with intellect, courage, and a steadfast sense of justice—an extraordinary journey across a world that resists change, yet ultimately bears witness to a woman who could not be denied.
