Joanna has everything a woman could desire: as the young, beautiful wife of a wealthy financier, her days are her own to spend at leisure - but her nights are solitary. Her older husband sleeps alone, and Joanna increasingly seeks a sense of fulfilment, some trace of danger and excitement to satisfy her sexually.
Several chance encounters shock Joanna into action. She becomes inolved with the mysterious 'O', a woman whose clients and employees experiment with pleasure, pain and 'issues of control'. Joanna's experiences with 'O' are thrilling and fulfilling, but she also learns why her husband denies himself her body and she begins to gather secrets and lay the foundation of her ultimate revenge.
