This tale is set in the year 1810 and follows hot on the heels of the story recounted in Sacrifice. An ex-slave is shipwrecked on the shore of Skomar Island and two strange objects found on his person end up in the possession of Mistress Martha Morgan of Plas Ingli. This leads her to involvement in the anti-slavery movement and into very grave personal danger as her own enemies have to be rescued from a man who has a very sinister mission …