David Sumner, a mild-mannered academic from the United States, marries Amy, an Englishwoman. In order to escape a hectic stateside lifestyle, David and his wife relocate to the small town in rural Cornwall where Amy was raised.
At the beginning of the 1913 Mexican Revolution, greedy bandit Juan Miranda and idealist John H. Mallory, an Irish Republican Army explosives expert on the lam from the British, fall in with a band of revolutionaries plotting to strike a national bank.
A wealthy Englishman finds his third wife dead. After the police discover that his first two wives had also died suddenly, an investigation is launched.
Jai, the orphaned boy adopted by the Monkey Man, helps missionary Charity Jones bring an organ to a friendly tribe, but they are captured by hostile natives.