A taut, atmospheric, psychological thriller about a disturbed young woman, Dorothy Mills, who is suspected of assaulting a young baby in a contemporary but timeless rural village. She is visited by psychiatrist and outsider, Jane, who discovers that Dorothy may not be responsible for her actions and may be possessed by a horrifying and malevolent force. As she helps Dorothy, Jane is confronted with her own past tragedies - and starts to unravel another terrible secret hidden by some of the local villagers.