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Meg Lytton comes from a family of witches. Her mother, who died in childbirth, renounced her gift in order to marry. But Meg's Aunt Jane continued to practise and has taught Meg to hone her skills. Sent to serve the Princess Elizabeth - in confinement at Woodstock, suspected of treason against her sister - Meg soon finds that her royal mistress has a strong interest in the occult and encourages her to continue. Elizabeth is beset by danger and must tread a delicate path through intrigues and religion. Meg, too, walks in peril. The ruthless witchfinder Marcus Dent has taken an uncomfortably close interest in her and if he were to discover her secret, he would send her straight to her death.