Simon Tregarth, whose own Earthly prowess had won him a throne and a witch-wife in an alien world, knew that both triumphs were precarious as long as the super-science of Kolder held a foothold on that planet. And his premonitions were right when those invaders from another dimension made their final diabolical strike for total conquest.
The Were Riders wore the shape of men but they were not human. The price of their aid was thirteen beautiful maidens to be taken a brides. This is the story of one of them.
Spurred on by a recurring dream, Tirtha accompanied by a falconer, embarks on a dangerous journey to her ancestral home, aware that she is bound by a spell to fulfill a mission whose purpose is unknown to her.