kara was born on the first, stormy, pre-dawn morning of winter to rowena ní néill and caw galanan mac drust. her mother, an irish sorceress, immigrated to dál riata due to the spreading christianisation of ireland. her father was the second son of a pictish chief hailing from the isle of skye who, by the time of kara's birth, was a famed warlord and a petty-king on the rise, ruling over a small territory in cowal.
the northern borderlands is a patchwork of split loyalties. some bow to arthur pendragon, while others resist his claim to the kingship of all britain. successive revolts fail to decide the issue, and violent tension is exacerbated by an increasingly zealous christian faction empowered by arthur's laws. caw's fortress falls, forcing his family to make a desperate escape. the years that come are, for kara, tangled with grief; rowena is murdered by christian knights, caw is killed in battle against camelot's allies, and two brothers— bleidd and aneirin— are slain only moments apart.
fostered in the court of gododdin for her safety, kara becomes a surrogate daughter and protege to queen morgawse. avenging her parents, meanwhile falls to her eldest brother hywel, who has keenly taken up their father's mantle. his resistance is vicious and resolute, launching raid after raid into arthur's territory. when he is finally captured, arthur puts him to the sword himself. hywel's death devastates kara; and with his warriors now pledged to her, she vows vengeance on the pendragon king.
grief-stricken kara leaves gododdin. though her travels first lead her back to dál riata, she is soon swept up in the fervour of a group of pagan rebels that take her to camelot itself. posing as a dalriadan dignitary, she works to undermine arthur's kingship and strikes up a short-lived love affair with eira ní dhochartaigh. grief and fury fester until prince medrod of gododdin comes for her. while her losses have hardened her, her love for medrod still blossoms, and after some consideration she agrees to return home with him. they marry on a wind-bitten brae, purple heather tangled in kara's hair.
meanwhile, lot’s resistance has reached stalemate but not surrender, whatever arthur pendragon might believe. lot’s sons, taken hostage at the close of the second alban revolt, take their positions in their uncle’s court with a thin veneer of fealty, feeding information back to their father, until he is killed in battle against the saxons. his death, and the marriages of gwachlmai and egrevayn prompt kara and medrod to join arthur’s court themselves, and kara quickly busies herself aiding those evading camelotian authorities and seeking refuge in other kingdoms, and acting as a spy for her father-in-law. to arthur, medrod’s wife is unsuitable and politically inconvenient; widely rumoured to be a witch and barely disguising her disdain for camelot, there is no question she is in the way of the high-king fostering the loyalty of his nephew.
while kara may no longer intend on destroying arthur herself, and aims only to help her people, there are others who do not view her actions in the same light. their cousin, ywain, accuses her of treason and witchcraft and arthur has no choice but to bring her to trial. unable to convince his uncle of her innocence, medrod escapes with kara back to gododdin.
on their return medrod takes up the crown of gododdin with kara as his beloved queen. in camelot, egrevayn and guinevak reveal the affair of guinevere and lancelot — when the ensuing conflict results in the deaths of a number of his brothers, arthur’s transgressions can no longer be ignored and medrod claims the high-kingship of britain himself, declaring war.