In a small western town, a father obliges a doctor to separate two conjoined twins in a very hazardous operation. One of the children dies but years after seems to have survived as his brother's second personality.

Simone harbours a dark secret. Since her parents separated, the 11-year-old has become withdrawn and mysterious. In order to win back the love of her depressed and alcoholic mother, she crosses an eerie boundary. Will her mother find her way out of Simone's labyrinth?