One queen exiled. Another headed for the gallows. Both hungry for revenge. England’s most infamous queens unite in vengeance against Henry VIII.

Anne Boleyn is going to die, and neither her cleverness nor her witchery can save her. So when her late rival, Catalina de Aragón, miraculously appears in her cell at the Tower of London on the eve of her execution, very much alive and offering a daring escape plan, no one is more surprised than Anne.

Lina doesn’t have Anne’s magic—but she has just as much hate for England’s wretched king. Severed from her daughter and stripped of all her influence, Lina breathes only for the Hellebore Sisterhood, a clandestine and powerful society with a vested interest in keeping both queens alive . . . and using their particular skills to advance womankind.

Anne and Lina’s old rivalries pale in comparison to a common enemy. And they're not alone. Anna von Kleve, Kat Howard, and even Catherine Parr all have their own bones to pick with the king. One by one, they capture their pawns, infiltrating the court and eliminating the men who plotted against them. Always inching closer to their true target . . .

And they want his head.