Wales, the year 1400, and Owain Glyndwr's fight for Welsh independence is triggered by the illegal annexing of a small, scrubby piece of land. "Silver Fox" is the story of that fight, and of three members of Glyndwr's household who are caught up in it. Rhiannon and her brother Llewelyn, fostered by the Glyndwr family, and Elffin, Glyndwr's youngest son, are swept away by the tides of war and passion.