When hikers Dayna and Eric find a young woman naked, terrified, and speechless, they're sure she's the victim of foul play. But the truth is much more shocking: she isn't human at all. She's Dun Lady's Jess, a horse transformed into this new shape by the spell that brought her and her rider, to whom she is utterly devoted, into this world. Posessed now of human intelligence but still a horse deep inside, Jess desperately searches this world for her master and rider, using her fiery equine spirit to take on human idiosyncracies—and human threats.