Western directed by Sergio Corbucci and starring Franco Nero and Tony Musante. A Polish mercenary named Sergei Kowalski (Nero) lends a hand to a ragtag group of revolutionaries in their fight against the Mexican government and their military. But he is himself being pursued by an American rival driven by revenge. But will Kowalski's mercenary ways sway the leader of the revolution from his righteous path and into sheer banditry?