The book traces the lives of the Netherwell women across several generations as they struggle against both external persecution and internal family conflict. While Myrtle attempts to live a peaceful life using her knowledge of herbs and healing, she is constantly weighed down by the responsibility of caring for her troubled and abusive twin, Marigold, who has been corrupted by dark magic. The plot explores Myrtle's sacrifices, including a difficult decision to give up her own child, and her eventual journey toward reclaiming her power and finding love with a kind man named Harry. Ultimately, the story culminates in a clash of power as Myrtle confronts the darkness in her bloodline to protect her family’s legacy.