As the wife of an ailing but very wealthy town selectman, Mary Sibley holds the distinction of being the most powerful sorceress in Salem, Mass. Ruthless yet vulnerable and with many secrets to hide, Mary leans on her ageless accomplice, Tituba, to help advance her agenda. When Mary's long-ago love interest Salem native John Alden returns from war duty to find the town paralyzed by fear of a witch hunt  her plans take an unexpected turn. Against a backdrop of townspeople pledging to rid evil.