It's 1916 and Indy finds that spies, submarines and Mexican revolutionaries make for one wild spring break. Indy and his girlfriend Nancy visit the laboratory of Thomas Edison and contend with dangerous German spies as they struggle to keep Edison's top secret new invention out of the hands of hostile enemy agents. To keep him from getting into more trouble, Indy is sent to visit his aunt in New Mexico, where he is kidnapped by Pancho Villa and swept into the Mexican Revolution.