The Sorcerer's Daughter is the third and final novel in The Defenders of Shannara trilogy. It chronicles the sorcerer Arcannen's attempts to bring bring down the Druid Order, and the efforts made by his daughter Leofur Rai and her partner Paxon Leah to stop him.
The Druids' hopes of continuing to build goodwill with the people of the Four Lands are dashed when a demon's murderous rampage at a peace summit leaves their political opponents dead. This casts new suspicions upon the Druid Order and forces them to flee from their enemies.
Paxon Leah, the Blade of the Ard Rhys and protector of the Druids, knows that blame lies with Arcannen Rai, the vile sorcerer he has battled and defeated before. But there's no time to for him to track down Arcannen as he must lead the wrongfully accused Druids to their sanctuary. It is a quest fraught with danger, as a furious agent of the Federation and his army snap at their heels and lethal predators stalk them in the depths of an untamed wilderness.
But Arcannen is playing a deeper game than Paxon realizes. Paxon's sister possesses the wishsong, a powerful magic that the sorcerer longs to control. However, Arcannen has not reckoned with the determination of his own estranged daughter, Leofur, who is also Paxon's devoted partner. Leofur sets out on a perilous quest to thwart her father's desires, while the vengeful sorcerer conjures his strongest magical skills, determined to destroy them all and claim the most powerful of magics for his own.