Thirteen-year-old fledgling writer Briony Tallis irrevocably changes the course of several lives when she accuses her older sister's lover of a crime he did not commit.

A family is invited to spend a weekend in an idyllic country house, unaware that their dream vacation will soon become a psychological nightmare.

Elly is asked by a family friend (Mena Suvari) to look after an elderly woman (Meg Foster) living in a remote cabin for a few days. She agrees, but soon discovers there is a demon hiding in the woman just waiting to break free.