Thia Beresford, bored with the demands of nineteenth century society, decides to forego the luxuries of Huntingley and embark on a riding expedition across the pampas of Patagonia. Accompanied by her father, brother, a playwright, two servants and her Newfoundland dogs, Thia joins the ship in Liverpool. On board she is intrigued by a mysterious Welshman, Euan Davies, and when they disembark in South America, she is pleased that he agrees to act as their guide. But after only a week in the saddle Davies' disturbing secret starts to unravel and Thia's party soon find themselves embroiled in a deadly game of cat and mouse with a group of dangerous prison escapees. Beset by Indians, inhospitable terrain, pampas winds and mountain lions, is it possible this mismatched group of travelers can survive?