In the dry, dusty western hamlet of San Angelo, landowner Joe Bradford kills his brother and then marries his brother's widow, Gertie. Gertie's son, Hawk, decides that something's rotten in this state of affairs and thinks about taking action

A group of mercenary soldiers from an African republic are hired to transport a shipment of weapons and ammunition across the desert to a revolutionary group seeking to liberate their country. Among the mercenaries are soldiers from Biafra and other battle zones. The journey will be marked by danger and disputes among the members of the expedition, which will greatly hinder the success of the mission.