In Serkland, there was a king named Hjarandi, who had a son named Hedinn. This son was a great sea-king and he pillaged all over the Mediterranean until twenty kings paid tribute to him. One day he met a beautiful woman sitting on a chair who called herself Göndul. She told him of Högni, and agitated him to test his strength against the northerner. Hedinn took three hundred men, and sailed both a summer and a winter until he arrived in Denmark in spring.
When the two men met they tested each other's strength and entered sworn brotherhood. As Hedinn was unmarried, Högni betrothed him to his daughter Hildr, his only child. Hildr's mother was Hervor, the daughter of Hjörvard who was the son of Heidrek Ulfhamr of the Hervarar saga. Hedinn soon met the beautiful woman again who asked him about what had happened since the last time. She gave him a magic potion and told him to crush Högni's wife with the prow of his ship and to kidnap Hildr. He did so and met the beautiful woman again. She gave him a new horn to drink and he fell asleep. In his dream, he heard Göndul say that she put him, Högni and their men under spells according to the wishes of Odin.
Högni hunted Hedinn and found him on an island named Hoy. Hedinn offered to give everything back to Högni and to sail away to Serkland and never come back. Högni, however, declared that nothing could atone the betrayal that Hedinn had committed.
The two armies started to fight and even though they cut each other all over, they stood still fighting and fighting for 143 years, so strong were the spells of Göndul, until Olaf Tryggvason arrived at the island.