In the year 1399, Welsh nobleman Owain Glyndwr is living out a peaceful gentleman’s life in the Dee Valley of Wales with his wife Margaret and their eleven children. But when Henry of Bolingbroke, the Duke of Lancaster, usurps the throne of England from his cousin Richard II, that tranquility is forever shattered. What starts as a feud with a neighboring English lord over a strip of land evolves into something greater—a fight for the very independence of Wales.
Leading his crude army of Welshmen against armor-clad columns of English, Owain wins key victories over his enemies. After a harrowing encounter on the misty slopes of Cadair Idris, the English knight Harry Hotspur offers Owain a pact he cannot resist.
Peace, however, comes with a price. As tragedies mount, Owain questions whether he can find the strength within himself not only to challenge the most powerful monarch of his time, but to fulfill the prophecies and lead his people to freedom without destroying those around him.