Anna is busy working at her desk job, when he finds a flash from her computer screen has caused her pain. She realises that she has a growing sensitivity to light, having to keep herself away from daylight, computer screens, television and most other light sources. This restricts her to spending weeks and months lying in the dark in a light proofed room of her boyfriends house.
The book does jump around in time, in some parts she can't stand any light at all, and in the next part she is out at dusk walking the neighbourhood. I found that a little distracting, but pushed through thinking how lucky she was to have a patient and supporting partner and family. 3/5