该剧本改编自洛朗·珀蒂曼金(Laurent Petitmangin)的小说《你需要什么》(What You Need from the Night),讲述了一个植根于洛林的家庭故事,讲述了一位铁路工人父亲和他的两个儿子在母亲去世后的故事。。記者莫里泰瑞費盡畢生心血調查山姆之子殺人案,執着的他堅信這些命案與撒但邪教有關。Javi, a young rent boy living in Madrid, comes to a sauna club looking for a job. But soon he'll find out a place full of secrets, the biggest of them being a strange man who will fall in love with him: the Phantom of the Sauna.。