Katherine Sedley lived by her own rules and loved who she pleased- until she became the infamous mistress of King James II...

London, 1675: Born to wealth and privilege, Katherine is introduced to the decadent court of King Charles II, and quickly becomes a favorite from the palace to the bawdy playhouses. She gleefully snubs respectable marriage to become the Duke of York's mistress.

But Katherine's life of carefree pleasure ends when Charles II dies, and her lover becomes King James II. Suddenly she is cast into a tangle of political intrigue, religious dissent, and ever-shifting alliances, where a wrong step can mean treason, exile, or death at the executioner's block. As the risks rise, Katherine is forced to make the most perilous of choices: to remain loyal to the king, or to England.

London, 1660: Ready to throw off a generation of Puritan rule, all England rejoices when Charles Stuart returns to reclaim the throne. Among those welcoming him is young Barbara Villiers Palmer, a breathtaking Royalist beauty whose sensuality and clever wit instantly captivate the handsome, jaded king. Though each is promised to another, Barbara soon becomes Charles's mistress and closest friend, and the uncrowned queen of his bawdy Restoration court. Rewarded with titles, land, and jewels, she is the most envied and desired woman in England--and the most powerful. But the role of royal mistress is a precarious one, and Barbara's enemies and rivals are everywhere in the palace.