Harriet Bishop, descended from a long line of witches, uses magic to help women in need -- not only ordinary women, but also those with powers of their own. She must intervene when a distant cousin wields dangerous magic to change the lives of two unsuspecting young people... one of whom might just be a witch herself. Frances Allington has used her wiles and witchcraft to claw her way out of poverty and into a spectacular marriage with one of New York's wealthiest new tycoons. She is determined to secure the Allingtons' position amongst the city's elite Four Hundred families by any means necessary -- including a scheme to make a glorious aristocratic match for her headstrong and reluctant step-daughter, Annis, using the same strange power with which she ensnared Annis's father. To save Annis from this dark magic, Harriet reveals to her Frances' misuse of their shared birthright and kindles in Annis her own nascent powers. Together, Harriet and Annis must resist her stepmother's agenda, lest she -- and the dashing young lord she suspects she could come to love -- lose their freedom, and possibly their lives.