The gang of vengeful women, known as the "Sisters of Light," are led by Amara, a former slave whose husband and child were sold by the corrupt monks. The Sisters plan to infiltrate the monastery under the guise of seeking refuge and then attack in the cover of night.
However, their plan is interrupted by the arrival of a group of Vikings led by Asbjorn, who are fleeing from the wrath of the demon creatures that have been unleashed upon them. Asbjorn and his men reluctantly agree to team up with the Sisters to defend the monastery against the demons.
As the night wears on, the combined group face overwhelming odds against the relentless demon onslaught. Each side soon realizes that the only way to survive is to work together, setting aside their differences and fighting for a common cause.
Asbjorn also learns of the Sisters' vendetta against the monks and begins to question his loyalty to his own cause. Meanwhile, Amara must confront her own demons and find a way to reconcile her desire for revenge with the need to protect the innocent monks and nuns trapped in the monastery.
In the end, the Vikings and Sisters must unite to face the ultimate evil lurking within the monastery, a dark force threatening not just their own survival but the fate of the world.
