The second Executioner Knight is off to Wales with a very important directive –William Marshal is determined to make a match between a Welsh princess and one of King John’s greatest enemies, thereby strengthening the growing rebellion against John. Outwardly, William Marshal supports the king but behind the man’s back, he is now plotting against the man. John is doing more harm to England and it is clear he must be removed from the throne with a king suitable for England’s rule. The Marshal wants John gone, but on his own terms. With a political marriage in mind, William Marshal sends Kress into Wales to escort Cadelyn ferch Rhys from her home, known as Mynydd Twywll (Mountain Dark), back to Chepstow Castle for the marriage. Cadelyn is one of the last full-blooded Welsh princesses, a very valuable commodity. But there is a complication – the princess falls in love with Kress along the way, and in spite of himself, Kress cannot deny his growing feelings for her.
The problems begin. Upon reaching Chepstow, the princess refuses the marriage to the man of William’s choice and William discovers it is because of Kress, who is now increasingly sympathetic to the Welsh cause. Unbeknownst to William or Kress, the princess leads a band of rebels on her own and no longer willing to be a political pawn, she is verging on waging all-out war against William Marshall. Fearing Kress will side with the Welsh princess, William betroths Kress to another woman and sends him away before the princess can destroy the life of a stalwart young English knight. While the princess was playing a political game, the truth is that she is very much in love with Kress. As his loyalties to William Marshall weaken, so does the princess’ loyalties to her rebellion. Love is the ultimate prize now and Kress is torn between duty and love. Will his sense of duty and his loyalty to England win out? Or will the love of a rebel princess be his downfall?