Arms dealer Yolaf Peterson aims to make a sale to guerilla Mongo, but the money is locked in a bank safe, the combination known only to Professor Xantos, a prisoner of the Americans. Yolaf agrees to free Xantos, accompanied by reluctant guerilla Basco, but a former business partner of Yolaf's- John 'The Wooden Hand', has other ideas.
Franco Nero
Tomas Milian
Jack Palance
Fernando Rey
Iris Berben
José Bódalo
Karin Schubert
Eduardo Fajardo
Gino Pernice
Tito García
Gérard Tichy
Lorenzo Robledo
Álvaro de Luna
Jesús Fernández
Claudio Scarchilli