The principal characters are the friends Nj ll orgeirsson, a lawyer and a sage and Gunnar H mundarson, a formidable warrior. Gunnar's wife instigates a feud that leads to the death of many characters over several decades including the killing by fire of the eponymous "Burnt Nj ll".

A major characteristic of the narrative is the presence of omens and prophetic dreams.

There was a man named Mord whose surname was Fiddle; he was the son of Sigvat the Red, and he dwelt at the "Vale" in the Rangrivervales. He was a mighty chief, and a great taker up of suits, and so great a lawyer that no judgments were thought lawful unless he had a hand in them. He had an only daughter, named Unna. She was a fair, courteous, and gifted woman, and that was thought the best match in all the Rangrivervales. Now the story turns westward to the Broadfirth dales, where, at Hauskuldstede, in Laxriverdale, dwelt a man named Hauskuld, who was Dalakoll's son, and his mother's name was Thorgerda. He had a brother named Hrut, who dwelt at Hrutstede; he was of the same mother as Hauskuld, but his father's name was Heriolf. Hrut was handsome, tall and strong, well skilled in arms, and mild of temper. . . .