Ruth Galloway and DCI Nelson are on the hunt for a murderer when Covid rears its ugly head. But can they find the killer despite lockdown?

Ruth is in London clearing out her mother's belongings when she makes a surprising discovery: a photograph of her Norfolk cottage taken before Ruth lived there. Her mother always hated the cottage, so why does she have a picture of the place? The only clue is written on the back of the photo: Dawn, 1963.

Ruth returns to Norfolk determined to solve the mystery, but then Covid rears its ugly head. Ruth and her daughter are locked down in their cottage, attempting to continue with work and home-schooling. Happily, the house next door is rented by a nice woman called Zoe, who they become friendly with while standing on their doorsteps clapping for carers.

Nelson, meanwhile, is investigating a series of deaths of women that may or may not be suicide. When he links the deaths to an archaeological discovery, he breaks curfew to visit the cottage where he finds Ruth chatting to her neighbour whom he remembers as a carer who was once tried for murdering her employer.

Only then her name wasn't Zoe. It was Dawn.

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