In 9th-century Orkney, the warrior Senua allows herself to be captured by Northmen slavers, intending to cross the sea to Iceland where her people are held in bondage. When a violent storm wrecks the slave ships, Senua washes ashore alone on the Icelandic coast, haunted by the voices that have followed her since childhood. She soon learns that the land is gripped by a different kind of terror: giants born from a volcanic eruption have driven settlements to ruin, and the survivors live under the tyranny of those who exploit the chaos. Guided by the mysterious Hiddenfolk and joined by unlikely allies, Senua sets out to confront the giants, free the enslaved, and face the human cruelty that feeds on fear.