Every guest has their secret. This time it's closer to home . . .Grief-stricken after the mysterious death of her sister Rosie, Tess starts bnb-ing out her sister's old room. She has a sneaky habit of going through her guests' belongings when they're out, teasing herself with forbidden glimpses into their lives, the adrenaline rush at the thought of being caught the only thing she can feel through the numbing pain of her loss.When handsome and inscrutable Arran takes the room, Tess soon finds and begins reading his diary. A diary which at first appears to chronicle a harmless crush Arran has developed on a stranger, but which slowly takes a darker, more menacing tone.Drawn to danger but also determined to protect another innocent woman in the way she was unable to protect Rosie, Tess begins to follow Arran, shadowing him through the streets of London to find out who this woman is and if she's at risk. But Arran isn't the only one who's being watched and Tess can't help but notice certain similarities between the woman in the diary and herself. Who's really following whom and how far might Tess go to tempt the same fate that befell her sister?