Harold of Wessex warns his father, Earl Godwin, of a rival's treachery, but he is ignored; the coronation of King Edward in England leads to Harold of Wessex's first encounter with William of Normandy.

Threatened by those in power in France and England, William and Harold each face grave danger; refuge in Flanders offers hope for Matilda; a vengeful Lady Emma hounds the Godwins.

Harold risks returning to Wessex for his wife; William plots against Henry in France as home truths compromise family ties.

Harold fights for his family's rights; William tracks his royal foe.

Tensions rise as Edward names William his heir. With ambitions to be King, Harold refuses to swear loyalty. Families fracture, alliances fail and Edward's illness remains a looming secret.

After the King's death, Harold races to secure the throne, making harsh choices; William plots to claim his promise but lacks ships; as Harold is crowned, news of an invasion reaches London.