It is time for this great love to be tested. But is anything strong enough to face the cries of heresy?

'If you will be a great man's mistress you must pay the price...'

1372 The Savoy.

Widow Lady Katherine de Swynford presents herself for a role in the household of merciless royal prince, John Plantagenet, Duke of Lancaster, hoping to end her destitution. But the Duke's scandalous proposition leaves her life of pious integrity reeling...

Seduced by the glare of royal adoration, Katherine becomes John's mistress. She will leave behind everything she has stood for to play second fiddle to his young wife and ruthless ambition. She will live in the shadows of the most powerful man in England in the hope of a love greater than propriety.

But soon the court whispers – whore, harlot, vile temptress – reach the ears of not just John's young bride but his most dangerous political enemies. As the Plantagenet prince is accused of bringing England to its knees who better to blame than shameless she–devil Katherine de Swynford? Dragged from the shadows, Katherine must now answer for her sins...