The film is a psychological thriller called "The Treatment" with a budget of £110 million produced by a major studio. It will focus on a possessed young girl and her father, who murdered the girl's mother. The film aims to make audiences uncomfortable by setting ordinary domestic scenes and then adding frightening elements. It will have a dark and mysterious plot that does not provide closure. The style will create an eerie atmosphere through settings like an old house, costumes, and lighter lighting as conditions allow.