A band of Mexican gunrunners employed by a revolutionary General accept an American mercenary into their gang, unaware of his true intentions.

In the rough years of the revolution in Mexico, the hardened bandit chief, El Chucho, is in need of arms, ammunition, and a much-sought-after machine gun to support the leader of the revolution, the rebel General, Elías. With this in mind, Chucho attacks a government supply train and gets an unforeseen assistance from Bill Tate--the American gringo in the impeccable suit--with whom will soon become friends. Now, Bill is truly indispensable to the gang, however, could he be hiding his true objective behind a boyish and calm face?—Nick Riganas