Quick recap
It's 917. Uhtred makes another try at retaking Bebbanburg, held by his cousin, while Constantin's Scots besiege the fortress. He uncovers a plot by Aethelhelm, King Edward's father-in-law, to fake a Danish attack, kill Æthelstan and clear the way for his own grandson. Uhtred exposes the scheme before Edward, Æthelflæd and Sigtryggr and takes Æthelstan as a hostage to keep him safe. He then pretends to give up on Bebbanburg and says he's sailing for Frisia. He disguises his ships as Aethelhelm's supply fleet and gets through the gate. After hard fighting he kills his cousin, who refused single combat, and takes Bebbanburg. Aethelhelm ends up ransomed instead of killed.

