In 1645, as the English Civil War rages, it's a dangerous time to be a witch. Jessica Jackson is a real time-witch whose familiar and lover, Titus, is a shifter. Borne from a long line of witches stretching back to ancient Lemuria, she can step through the doors of time, using her Grimoire, an ancient book of magic garnered from magicians and witches from many civilizations and times.

In the sleepy Norfolk town of Pendlebury, Jessica settles in as a healer and has a passionate love affair with the schoolmasters' beautiful sister, Constance. Life is good until a witchfinder arrives, determined to hunt down and expose a coven of witches! Jessica has to use her wiles, her wit, and her magic to stay alive.