In the first book of The Highland Ballad Series, The Hostage of Glenorchy, young Abby Gordon, daughter of the Queen’s lute player (this is Mary of Scotland, engaged at the time to the Dauphin of France and living in Paris; her own biographies indicate that at the time she was a potential heiress for several thrones, and may have actually already been Queen of Scotland although her mother was at the time serving as regent. But in this book, she is only a fairly important minor character.) – anyway, Abby was sent to Scotland by her father for her safety. Having overheard something about a plot to kill Queen Mary before she left, she took it upon herself to travel disguised as a boy so no one would know who she was. She arrived at Kilchurn Castle mostly unsuspected. There she met Iain MacGregor who was being held hostage there for the good behavior of his family and fell in love with him.
Then everything fell apart. Iain escaped. Abby was discovered to be a woman, was accused of being both a witch and a spy, and was badly beaten. She felt herself forced to escape as well.
As The Mists of Glen Strae opens, Abby is struggling to find her way to Glen Strae Castle, where Iain has told her the ring he has given her will assure her welcome. It seems Iain has omitted some information, because his father, the clan head, referred to by preference only as MacGregor, assumes right away that Abby and Iain are engaged. As soon as Iain appears at home, he arranges almost immediately to have them hand-fasted.
It seems that the protection of the MacGregors is a little shaky too. Their near neighbors (but not friends) the Campbells, including Lord Glenorchy at Kilchurn Castle, are working diligently to have the whole clan exiled so they can take over all their holdings. And Iain’s fiery sister, Morag, who also goes about dressed as a boy when it suits her, isn’t helping matters any by initiating raids on them.
After the hand-fasting, Abby travels with Iain to the Scottish court to petition the Queen-Regent, Mary (or Marie) of Guise, Queen Mary’s mother, to allow the MacGregors to keep their lands. Following this, they travel to France hoping to find out what has happened to Abby’s father. She is concerned that she hasn’t heard from him since she left France earlier.
While she is there, she learns who, or at least what, her father really is. She also learns what Iain really is. And she is most disappointed that her father will not let her marry Iain.