Following the tragic loss of their unborn baby, Ethan and Claire decide to take a break in their relationship. While Ethan goes to visit his family back in the US, a depressed Claire remains home alone to sort her head out. But while sorting through some belongings, she discovers a mysterious wooden box in the loft, inside of which is something even more unexpected...something that she soon wishes she hadn't found. By the time she goes to bed she's already become very ill, but it's an illness unlike anything she's ever known. Before long the illness has transformed this once kind and gentle woman's reality, into a disturbing yet very real nightmare...