In the mid-11th century, noblemen Harold of Wessex and William of Normandy are exploited as pawns in royal plots on both side of the Channel. The coronation of King Edward in England leads to the pair's first encounter. Harold warns his father, Earl Godwin, of a rival's treachery - but he is ignored.

Threatened by those in power in France and England, William and Harold each face grave danger, their families in peril. Refuge in Flanders offers hope for new mother Matilda, while vengeful Lady Emma hounds the Godwins.

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

Crowned heads are endangered as Harold fights for his family's rights and William tracks his royal foe.

Harold and Edith risk their lives to bargain with William but get a guarded reception. Harold's siblings face hardships trying to secure their family's future.

Ambition drives William and Harold to each seek costly alliances, against the advice of their womenfolk, to enhance their chances of winning the crown.