"I'm an outright rationalist, an atheist, left the church at eighteen, I have never been interested in mysticism, the occult, telepathy or anything of that sort ... Whenever it's a question of having to believe in something instead of being given proof, I opt out ..." After her daughter has died in a riding accident, Valerie's world becomes completely unhinged. Suddenly a horse called Gitanes turns up and declares he is a medicine horse and has come to heal her soul. The horse owner, Tom, a half-breed Indian, invites Valerie to join him on a journey to Arizona in the USA. There amongst the descendants of native Americans Valerie undergoes spiritual initiation into unknown worlds. Gradually she becomes aware of the special gifts horses have ...