The late century in England and Robin Long Stride (Russell Crowe), a common where the third gunner. After the death of Richard the Lion Heart in battle, Robin and three other soldiers often attempt to return, after ten years spent fighting abroad. Along the way she walked into an ambush by the police Sir Godfrey King (Mark Strong), one knight with English and French derivation of loyalty. The French king had them Sir Richard Godfrey murder. Having discovered the king is dead, Sir Godfrey was driven by the arrival of Robin and his companions. With the goal of a safe return to England and richer than the bag on the left, Robin and steal the army knights slain men and one for the British ships on the coast under the condition of the gentleman. Before leaving the scene of the slaughter die promises Robin Knight, Sir Robert Loxley, a sword, the man returned to his father in Nottingham.

After his arrival in England, Robin (who took the identity Loxley) was selected for the royal family on the death of the King and witness the coronation of King John (Oscar Isaac), the younger brother of the recently deceased Richard . John arrogant king shows no remorse for his bad Kingdom and claims hard to collect taxes, Sir Godfrey to send north to the task of increasing revenue. Without King John, Sir Godfrey is an agent of the King of France, and used by the Royal Decree chaos stimulated enough to cause a civil war in England.

A Robin Hood and his friends to Nottingham, where his father Loxley, asks Walter (Max von Sydow) him to move his son to the family land taken by the crown to avoid. Loxley is a widow, Lady Marion (category Blanchett), Robin initially wary, but soon warm to him when he recovers grain taxed the people of the city system.

Meanwhile, Godfrey has caused the actions of the Barons northern, marching to a meeting with King John, and demand to sign the Charter of Rights. Realizing the deception of Godfrey, and know that people must agree with the French invasion at the ever king. A battle soon after that and looting Godfrey Nottingham men, and Robin and driven by the Barons north.

The film ends with the invasion of the south coast of England by the French, who are happy because the land by the British Army. The British victory in this struggle began, during which kills Robin Godfrey good arrows making long distance. In the final scene, John King denies the floor to the Magna Carta, Robin and progress reporting to be an outlaw. Therefore, Robin of Sherwood Forest moves to form what will be the Merry Men and Sherwood Forest win the recognition of Robin Hood (Robin Hood) as a legendary figure of English folklore.