Synopsis/Details
After the brutal execution of her husband on false charges of treason, Jeanne de Clisson—a noblewoman of Brittany—loses everything in a single day. Stripped of her lands, hunted by the crown, and left with nothing but rage and resolve, she makes an unthinkable choice: she will take her revenge to the sea.
Seizing a ship and gathering a band of desperate men, Jeanne transforms herself into something far more dangerous than a grieving widow. With black ships and blood-red sails cutting through the waters of the English Channel, she launches a relentless campaign against the French crown—targeting supply vessels, warships, and trade routes with calculated brutality.
But Jeanne is no ordinary pirate. She leaves one survivor alive after each attack—not out of mercy, but to carry a message. As stories spread of a mysterious woman who kills without hesitation and vanishes into the fog, fear begins to cripple French commerce and morale.
As her legend grows, so does the response. Commander Armand de Valois, a brilliant naval strategist, is tasked with hunting her down. What follows is a high-stakes game of cat and mouse across the open sea—two tactical minds locked in a battle of will, strategy, and survival.
But Jeanne’s war is not without cost. Personal loss and the weight of her choices begin to harden her into something even she no longer recognizes. By the time the final confrontation arrives, she is no longer fighting for justice—she is fighting to become something greater.
Something unforgettable.
The Lioness of Brittany is a cinematic historical action drama based on true events—combining the emotional intensity of Braveheart with the relentless sea warfare of Master and Commander, centered on one of history’s most ruthless and legendary female pirates.
PRODUCER NOTE:
• Limited primary locations (ships / sea / minimal interiors)
• Contained cast with scalable battle sequences
• Strong female lead with awards potential
• Built-in historical hook with franchise/series potential




















