In the 12th century, a Swedish knight named Arn Magnusson is sent to the Holy Land as a Knight Templar to fight in the Crusades. While there, he becomes separated from his lover and is torn between his duty as a Templar and his love for her. Arn must navigate the treacherous battles and political strife of the Crusades while trying to reunite with his beloved.
Arn, a medieval knight and a member of the Knigths Templar, continues his mission to establish peace in 12th-century Sweden while navigating the dangerous world of war and religion.