Born in 1150 to a noble Swedish family and coming of age at a monastery under the tutelage of a Cistercian monk and a former Knight Templar, young Arn Magnusson is sent to fulfill his destiny beyond the cloister walls. But the world awaiting him is a place at odds with his monastic ways. And when the murder of a king engulfs Western Götaland into a whirlwind of intrigue and ruthless power plays, headstrong and naive Arn is forced to leave the woman he loves behind and take up arms to battle infidels in the Holy Land.