Freydís joins an expedition to Vinland led by Þorfinnr Karlsefni. Her major part in the story is intervening in a battle between the Norse and the native Skrælingjar. The natives are mounting an attack and have driven the Norse into a retreat.

Freydis came out and saw how they were retreating. She called out, “Why run you away from such worthless creatures, stout men that ye are, when, as seems to me likely, you might slaughter them like so many cattle? Let me but have a weapon, I think I could fight better than any of you.” They gave no heed to what she said. Freydis endeavoured to accompany them, still she soon lagged behind, because she was not well [pregnant]; she went after them into the wood, and the Skrælingar directed their pursuit after her. She came upon a dead man; Thorbrand, Snorri’s son, with a flat stone fixed in his head; his sword lay beside him, so she took it up and prepared to defend herself therewith.
Then came the Skrælingar upon her. She let down her sark and struck her breast with the naked sword. At this they were frightened, rushed off to their boats, and fled away. Karlsefni and the rest came up to her and praised her zeal. – Sephton’s translation