Set amidst the turmoil of the Congo Crisis, a mercenary team is assembled for a dangerous mission to retrieve $25 million in diamonds from a mining town besieged by rebels. The team is led by Captain Curry, a tough and resourceful mercenary, who is accompanied by his loyal and strong-willed second-in-command, Ruffo. Also on the mission is a former Nazi, Henlein, whose presence creates tension within the group. The men embark on their mission by train, equipped with a military unit and a state-of-the-art railcar loaded with weapons. Their journey is fraught with peril as they navigate through jungle terrain and hostile territories while constantly under the threat of rebel attacks.

As they advance towards their objective, internal conflicts escalate, particularly between Curry, who is determined to complete the mission and maintain order, and Henlein, whose past and volatile nature strain the team's dynamics. Meanwhile, the atrocities of war weigh heavily on them, raising questions about morality, loyalty, and the cost of their pursuit. As they neared their destination, obstacles intensify with rebel offensives and unforeseen challenges putting their skills, resolve, and humanity to the ultimate test. The tension mounts as they must decide how far they are willing to go for fortune and survival amidst the chaos surrounding them.