Il solitario del West

A pack of escaped Apaches carries out massacres on the edge of the Navajo reservation! Kit Willer, having seen his best Indian friend killed, falls into a state of melancholy: to cheer him up, the photographer O'Sullivan urges him to follow him on a scientific expedition headed to the Isthmus of Panama with an escort of marines to study the possibility of opening a canal. Some time later, informed by his friend Colonel Turner that the mission could be subject to sabotage, Tex reaches Kit, in time to start a fight at the consular reception in Cartagena!