Hugh Cullane, accused of murder and sentenced to hang, is forced to deliver a message of betrothal to four-year-old Queen Mary of Scotland. He faces death yet again when, in rejecting the proposal, the queen's guardian orders his severed head sent back to England in a jar.
Trained to protect her queen at all costs, Katherine Payne can show no mercy to the handsome messenger, despite the way his stolen kiss unsettles her single-minded sense of duty. Trapped between the English and Scottish armies, she must escape with Mary. Hugh joins her as they are chased by men determined to murder the young queen in their own quest for power.