Unemployed 28 year old Sophia is at the tail end of a long period of recovery from alcoholism through which her brother Simon has supported her. More than just her brother - Simon is her best friend and the only one she can always count on no matter how many stupid decisions she makes. When he goes missing she'll move heaven and earth to find him – as he would do for her.
Her search leads her to a mysterious country house where Simon is living a sexual fantasy with two young women he barely knows named Agnes and Rose. Sophia has unknowingly entered a nightmare of evil and sacrifice.
Three elderly sisters and their imposing assistant Marjory rule the house with a strange and nefarious control over Simon and the two women he says he's in love with. Sophia doesn't trust the sisters but, despite her insistence, Simon refuses to leave. He is not himself - cruel, cold. Sophia must fight her instinct to run in order to protect her brother from the sisters.
When Rose goes missing Sophia decides to investigate. She searches the darkest hidden areas of the house and discovers that other women have recently disappeared. She learns the sister's terrible secret - they are evil witches and are murdering women in nocturnal demonic sacrifice!
Sophia and Simon barely escape with their lives - but for them the true horror has only just begun. The sisters have uncovered the truth about Sophia - and her brother has begun to change.