Until Cassia Fallon inherits a fortune from her godmother, hers is a life half lived. Having graduated from one of England's finest medical schools the nearest she has come to practicing medicine has been as an unpaid secretary to her doctor husband Edward. With her newfound wealth she is finally free to do as she pleases and resumes her medical career with passion and determination. Edward can only look on resentfully as his wife's confidence grows and she begins to revisit other, more dangerous, parts of her past. Cassia is questioning her marriage, her future, her everything... except where the money has really come from and why. It soon becomes clear that her legacy may not be such a blessing after all, but rather a dark, corrupting force. The question, however, is not can Cassia resist it, but does she want to...?