In the 13rd-century England, under pressure of campaign of the barons and the Knights Templar, totalitarian King John has to sign the Magna Carta recognizing rights of all England freemen. However, after that, he regrets of this decision and hires an army of Danish mercenaries, mindlessly massacres people to recapture his kingdom. Thomas Marshall (James Purefoy) , one of the Templar knights and his friends has fought bravely to defend Rochester Castle against the tyrannical King John’s attack.