Tessa macFindlaech meets three witches on a Scottish hillside as she leaves her home to join the household of her uncle, the thane Macbeth. The weird women make predictions for her future, but Tessa sees no likelihood of truth in them. After all, the first crone claims Tessa is on her way to England, which is in the opposite direction. Surprises await that make her reconsider the prophecies. When Tessa discovers that Jeffrey Brixton, a guest in her uncle's castle, is a spy, he captures her and takes her to his home in England. There she must face the fact that her only asset is her beauty, her only friend the woman she believes to be Jeffrey's mistress. After a year in England, Tessa is married but not a wife, which the witches predicted. When Jeffrey is reported dead, she returns to Scotland.
