What would you do if you found out something you shouldn't know about your best friend's husband? Lucy finds herself in exactly that situation when a colleague starts showing her pictures of her honeymoon in the Maldives. But in one of the photos, Lucy spots her best friend's husband, apparently on a luxurious holiday with another woman.The discovery is devastating to Lucy. She and her own husband do everything with their friends: the four of them trust each other implicitly. Determined to carry on as normal until she has more proof, Lucy's plans are derailed when news breaks of a British woman who has gone missing in the Maldives. Lucy suddenly can't help but suspect her friend's husband was not only there, but may have been involved.But when Lucy discovers something unexpected about the identity of the missing woman, she is forced to question whether everybody around her knows more than they're letting on. Is she actually the one most in the dark?.