Warriors of the Storm recap

The Norse sea-king Ragnall Ivarson, driven from Ireland, lands a great army near Ceaster to carve a kingdom from Northumbria and Mercia. Uhtred, holding Ceaster for Aethelflaed, is distrusted by some because his daughter Stiorra is married to Ragnall's brother Sigtryggr. Uhtred storms Ragnall's fort at Eads Byrig, seeing through the bad-faith surrender of his old enemy Haesten, and Ragnall retaliates by slaughtering captives and returning Uhtred's estranged priest son Oswald mutilated by Brida, Uhtred's first lover turned bitter foe. Uhtred sails to Ireland to relieve the besieged Sigtryggr and Stiorra and brings them to Britain, then hammers Ragnall's growing army with raids until the final battle, where Ragnall's support collapses and Uhtred kills him. At Eoferwic, Stiorra kills Brida. With Aethelflaed's consent Sigtryggr becomes King of Northumbria, sworn never to attack Mercia, with Stiorra as his queen.

Earlier in the series: Uhtred of Bebbanburg, a Northumbrian noble raised by Danes and still a pagan, was cheated of his ancestral fortress by his own kin and became the greatest warlord of the Christian Saxons, serving Alfred and then his children. He destroyed Cnut Ranulfson's Danish army at Teotanheale, and after Lord Aethelred of Mercia died of his wounds, Uhtred maneuvered the Mercian Witan into choosing Aethelflaed - Alfred's daughter and Uhtred's lover - to rule Mercia. He was healed of the near-fatal wound Cnut's sword had given him, took Eadith as his woman, and defeated the young Norse sea-king Sigtryggr at Ceaster, costing him an eye. Sigtryggr sailed back to Ireland in peace, taking with him Uhtred's daughter Stiorra, who chose him for love with her father's blessing. Uhtred's disowned eldest son serves the church as Father Oswald; his second son, a warrior, carries the name Uhtred.

A Norse fleet lands on the Mersey, near Ceaster. It belongs to Ragnall Ivarson, called the Sea King, a warlord driven out of Ireland and hungry for a kingdom in Britain - and he is the elder brother of Sigtryggr, the husband of Uhtred's daughter Stiorra, a kinship that lets Uhtred's Mercian rivals whisper that he cannot be trusted in this war. Ragnall fortifies the old fort at Eads Byrig in the forest near Ceaster and begins drawing to his banner the Danes and Norse of Northumbria, swelling his army while the Saxons argue. With him is Uhtred's oldest surviving enemy, the endlessly slippery Haesten, and behind him in the north stands Brida of Dunholm, Uhtred's first lover, whose hatred of Uhtred and of all Christians has become a religion of its own. Uhtred holds Ceaster for Aethelflaed and presses for hard, fast action against the invaders before Ragnall's strength becomes unbeatable, while the Lady of the Mercians must balance her warlord's instincts against her cautious counsellors.

Uhtred strikes first. Seeing through Haesten's offer to surrender Eads Byrig - a bargain meant only to buy Ragnall time to recruit in Northumbria - Uhtred storms the fort and takes it, capturing prisoners and denying Ragnall his forward base. Ragnall answers with calculated savagery: in revenge for his dead, he slaughters dozens of captives within sight of Uhtred's men and sends one back alive - Uhtred's estranged eldest son, the priest Oswald, mutilated and unmanned by Brida's own cruelty. The atrocity remakes the war for Uhtred: what began as the defence of Mercia is now also a father's reckoning. Word from across the Irish Sea adds urgency - Sigtryggr and Stiorra are besieged in Ireland by Ragnall's former allies - and Uhtred takes ships and sails to their relief, bringing his daughter and one-eyed son-in-law safely to Britain. Ragnall, meanwhile, ravages across Northumbria and northern Mercia, his army still growing, while Uhtred prepares to answer him with something better than a defensive war.

Uhtred carries the war to Ragnall. With Aethelflaed's reluctant blessing he surprises the Sea King's encampments, kills hundreds, and takes horses, families, and plunder, and the blows tell: Ragnall's coalition of Norse and Danish crews, held together by success, begins to crack. When the decisive battle comes, Ragnall orders his army forward and only half of it obeys; Uhtred's men charge into the wavering host and Ragnall is beaten and killed. Uhtred then rides hard for Eoferwic, where Brida rules in Ragnall's name and has been crucifying Christians in her war against the god she hates. The city falls to him, and Brida - the girl he once loved, the woman who maimed his son - is overcome; Uhtred gives the kill to his daughter, and Stiorra ends her. In the settlement that follows, Aethelflaed consents to Sigtryggr taking the throne of Northumbria at Eoferwic on his sworn promise never to attack Mercia. The invasion is destroyed, Oswald is avenged, and Uhtred's daughter is a queen; the north now has a Norse king bound to Uhtred by marriage, and Bebbanburg still waits.

The war ends with Ragnall dead and the north remade. When the armies finally meet, Ragnall's cause has already rotted - at his order to advance, half his men hold back - and Uhtred's charge breaks and kills him. Uhtred then rides on Eoferwic, where Brida has been ruling in Ragnall's name and waging a savage war on Christians. Uhtred takes the city and overcomes Brida, his first lover and oldest enemy, and it is his daughter Stiorra who kills her. The settlement that follows shapes the next books: with Aethelflaed's consent, Sigtryggr - Ragnall's brother and Stiorra's husband - takes the Northumbrian throne at Eoferwic, on his promise never to attack Mercia. Uhtred has destroyed the invasion, avenged the mutilation of his son Oswald, and made his own son-in-law a king; his daughter is now a queen in the north. Mercia stands secure, and Bebbanburg, Uhtred's stolen birthright, remains unclaimed - the last piece of his life's ambition still to win.