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Ill omens and border raids make Uhtred extra-vigilant at his northern outpost. King Sigtryggr is visited by his notorious brother Rognvaldr.

A betrayal at Eoferwic sends Sigtryggr in search of aid, while Uhtred begs Aethelflaed for military support she cannot give. Edward meets a new ally.

In the aftermath of the tragic battle for Eoferwic, Sigtryggr is forced to make a painful choice. Edward learns of Aethelhelm's intrigues in Mercia.

Rivals secretly advance competing successors upon the death of a Mercian ruler. Brida finds solace in the faith of her prisoner, Father Pyrlig.

Aethelhelm's subterfuge successfully foments war tensions between Edward and Sigtryggr, but his thugs make a crucial mistake in attacking a pilgrimage.

The forces of Edward and Sigtryggr march toward battle as Uhtred races to reveal the truth of Aethelhelm's scheming and avert a ruinous war.

Edward offers a role to Stiorra that would restore her to power. Aethelhelm meets with a Saxon enemy. Uhtred has a long-overdue reckoning with Brida.

Upon learning of Aethelhelm's location, Uhtred proposes an audacious attack to rescue Aelfwynn and restore his birthright — but Edward is cautious.

Edward marches his troops north while Uhtred recruits a small force to infiltrate Bebbanburg. King Constantin arrives to meet his new bride, Aelfwynn.

Armies converge in an epic, final showdown that determines the fate of a king's dream for England — and Uhtred's hope of securing his family's future.