Rumors of demonic possession at a religious convent prompts a church investigation into the strange goings-on among its nuns. A disaffected priest and his neophyte are confronted with temptation, bloodshed and a crisis of faith.

Shirin has just moved into a semi-detached house on the outskirts of town with her partner Fredrik and his son, Lucas. When Fredrik is away from work, strange sounds begin to come from the other uninhabited part of the house. And Lucas suddenly out of nowhere has a new "best friend."