After the death of her child and the end of her marriage, Hilary Craven has nothing left to lose--or so she believes until she takes on a dangerous intelligence assignment. Hilary, who resembles the late wife of a missing physicist, agrees to take on the woman's identity to help solve a series of mysterious disappearances. She's soon on her own, or so she believes. Emilia Fox's male voices may be gruff, but she's an ace with these Christie cliff-hangers--creating tension and, at times, a romantic atmosphere. She shifts her tone gradually as Hilary's character evolves from grief to steely resolve, drawing listeners into Hilary's plight.