The Eagle is a historical adventure film set in Roman-occupied Britain. The story follows a young Roman soldier named Marcus Aquila who embarks on a quest to restore his father's honor by finding the lost Ninth Legion's golden emblem, the Eagle of the Ninth. With the help of a British slave named Esca, Marcus travels beyond Hadrian's Wall into dangerous territory inhabited by fierce tribes. As they face treacherous challenges and betrayals, Marcus and Esca must rely on each other to survive and achieve their goal.