Sent by his fireworks manufacturer father to South America to peddle the pyrotechnics, John Arnold, Jr., has his last chance to make good. He finds in Santa Maria a just-completed revolution, the celebration for which provides a ready market for his products. Adventure beckons him further, however, when John falls in love with Zorra Gamorra, the daughter of the deposed president. With the aid of his fireworks, John engineers another revolution that re-installs Zorra's father in the presidency. The celebration that follows requires a large order of fireworks from Arnold, Sr. - thus reinstating Arnold, Jr., in his father's good graces.