Nineteen-year-old Nora enters the enigmatic Parker mansion as a high-priced nanny, but she carries secrets that far outweigh her salary. While the arrogant Parker heirs view her with suspicion and dark desire, Nora quietly deploys her mastery of medicine, elite education, and combat skills to protect her traumatized sister. As the family tries to break her, they find themselves instead mesmerized by the most capable and dangerous woman they have ever encountered.