AD 117: The Roman Empire stretches from Egypt to Spain, and East as far as the Black Sea. But in northern Britain, the relentless onslaught of conquest has ground to a halt in face of the guerrilla tactics of an elusive enemy: the savage and terrifying Picts led by revenge-hungry Pict Warrior Etain. When the Roman legion is ambushed, the seven surviving Romans pledge to rescue their leader and return to Rome to re-group.