Finding the battered body of a young boy was not unusual in Bloody Mary's cruel England. However, the stabbed tongue, a false seal and strange letter implicate Princess Elizabeth, threatening to bring down the Tudor Dynasty.

Doctor John Dee and his secret apprentice, Margaretta, using his brilliant mind and her strange abilities, embark on a perilous journey to solve this brutal murder. Before their work can really begin, another body is found.

As Dee and Margaretta delve deeper into their investigation, they uncover a web of deceit, political intrigue and treachery that threatens to engulf them both. When more bodies are discovered and arrests are made, time is running out. With rumours of witchcraft and treason swirling around them, can they untangle the mystery before it's too late?