Irish adventurer Emmett Keogh finds himself partnered with a hard-drinking priest named Van Horne in revolutionary Central America. Tricked into delivering guns by smuggler/con man Jennings, the three end up joining forces against despot Tomas de la Plata, who treats his subjects ruthlessly and who has a special hatred for priests. Van Horne, who seems to be a priest in costume only, decides to stand up to de la Plata and lead a revolt against him.