Haunted by the disappearance of his father, who vanished with the Roman Ninth Legion on an expedition into the north of Britain, centurion Marcus Aquila (Channing Tatum) sets out to unravel the mystery and recover the legion's eagle standard. But in the wilds of Caledonia, the soldier and his British slave (Jamie Bell) encounter fierce native tribes and other dangers. Kevin Macdonald directs this adaptation of Rosemary Sutcliff's novel.