68 AD. The XIV Legion under the command of General Suetonius and the Tribune, Gnaeus Julius Agricola, march west on a mission to crush insurgent tribes in Rome's newest Province, Britannia. Fergus MacAmergin is an officer in a Celtic auxiliary cavalry regiment that rides alongside them. As the British tribes wage guerrilla war on the Romans, Fergus falls foul of his commander. His punishment is to lead a squad of men on a suicidal mission deep behind enemy lines. Joining forces with Agricola, Fergus is tasked with finding a mystical spear, said to be the weapon that pierced the side of Jesus Christ on the cross. As the assignment unfolds, it becomes clear that there is more to the spear than meets the eye and he is heading directly for a confrontation with dark forces from his past.