Sogecine (Firm).

A devoutly religious mother of two ailing children has moved with her family to a mansion on the English coast. Her two children both suffer from a rare photosensitivity disease that renders them extremely vulnerable to sunlight, prompting the rule of having only one door open in the house at a time. When one of the children claims to see ghosts, Grace at first believes her newly arrived family of eccentric servants to be responsible, but chilling...