Claudia Morgan-Brown finally has it all. Pregnant with a much-wanted first baby of her own, she has a happily established family of two young stepsons and a loving husband with a great career. But she is also committed to her full-time job as a social worker, and her husband travels often. So when Claudia hires Zoe to help her around the house in anticipation of the babys arrival, it seems like the answer to her prayers. But despite Zoe's glowing recommendations and instant rapport with the children, there's something about her that Claudia cannot trust. Moreover, there has been a series of violent attacks on pregnant women in the area, and Claudia becomes acutely aware of her vulnerability. With her husband out of town for work and her family far away, who will be there to protect her? And why does she feel unsettled about Zoe?