Jargan is a summer gambler wintering in the Western town of Big Horn when he saves the life of Don José Cordoba and unwittingly acquires a new job. Soon he finds himself on a boat to Buenos Aires, having gained passage as the horse handler of two extraordinary horses: one called El Pantera, and a killer named Asesinato. He must use his innate wisdom and survival skills to protect himself and his charge against malignant men with a brutal love of cruelty.
"[Max Brand's stories] have defined the West for thousands of readers attracted to his bright, vigorous prose, making him one of America's most popular writers." (Midwest Book Review)