Although the young man William (Heath Ledger) was born in a civilian family in France, he dreamed of becoming a knight since he was a child, and he practiced swordsmanship and horsemanship since childhood. However, in the society at that time, only nobles were qualified to be knights, so William only served as a squire of a noble knight. In a jousting match, William's master suddenly died unexpectedly during the break. William had an idea, put on his master's armor, rode his mount, impersonated and won the game. Holding the victory trophy, William decided to continue to impersonate his master to participate in the World Knight Championship held in London, and make himself a real knight by winning the competition. William set off!