Alice Saunders, striking out on her own following the traumatic breakup of her marriage, rents a drafty attic room in a ramshackle London boarding house. Run along eccentric lines by the scatty landlady, the house contains a curious assortment of people. Most intriguing to Alice is Mary, a young woman who is clearly terrified of something – or someone. Alice must sort out her own life before she can help the deeply hostile girl, but what is Mary hiding from? Why does she react so violently to Alices occupation of the attic? And who is the mysterious stranger asking questions about her? Mary may try to conceal the truth, but a secret so terrible must come out… especially when murder is involved.