With the Starry Messenger comet drawing ever closer, John Alden fights for his very life, while Anne Hale works to comfort and protect one whose life or death brings with it great consequences for Witch and mortal alike. She soon learns another unfathomable secret about her past, and finds she's faced with a terrifying decision that could greatly impact the Countess's plans. Mary, palpably affected by recent events, finds herself in a wholly unfamiliar situation, leading her to try a risky gambit. Meanwhile, when John shares shocking and unbelievable information with Cotton, it leads the younger Mather to seek out answers on his own, but he discovers only more questions; Mercy pursues desires of her own, but finds another's prediction to be fatefully and disappointingly accurate; and Isaac finds himself in a wholly unfamiliar position among his fellows.
Set in the volatile world of 17th century Massachusetts, it explores what really fueled the town's infamous witch trials and centers on Mary Sibley, the beautiful, ruthless but vulnerable wife of an ancient, ailing but very wealthy Salem town Selectman.