The sixth son bears a curse as certain as the seventh son bears a blessing. When Tadhg MacNaughton's betrothed is ripped from his arms and married to another, he believes the legend is true.

Tisa O'Brien's life slams into a downward spiral at the news she is no longer betrothed to the love of her life but to the tanist of a warring, prideful clan with dangerous political aspirations, the Meic Lochlainn. She faces her destiny with all the strength and dignity of her Irish heritage despite dealing with a husband who resents her, fighting off the lustful advances of her father-in-law, Aodh, and longing for the husband of her heart.

Tadhg MacNaughton makes a deal with the devil to ensure the survival of his clan as he is commanded to fight with Aodh who envisions himself the new Brian Boru, High King of Eire. Up close and personal, Tadhg must witness his true love's marriage and remain silent even as it rips him apart. When a sinister plot to over throw King William of England led by the exiled Leofrid Godwin and Clan Meic Lochlainn comes to light, Tadhg is faced with saving his clan or endangering his sister and her Norman husband.