Indy and his girlfriend, Nancy Stratemeyer, whose father created the Nancy Drew mystery series, visit the laboratory of inventor Thomas Edison. The two must 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 any more trouble, Indy is sent to visit his aunt in New Mexico. While there, he is kidnapped by Pancho Villa and swept into the Mexican Revolution. Chaotic, free-wheeling border towns, a "Wild Bunch" style train robbery and a colorful barroom encounter with a young George Patton make for thrilling entertainment in this action-packed movie.

In Italy, Indy's espionage work takes him behind enemy lines where he embarks on an important propaganda assignment that he hopes will bring a swift end to the war. Along the way, he engages in a comic rivalry with Ernest Hemingway over the affections of a beautiful Italian girl. After being wounded in action, Indy is transferred to North Africa where he joins the French Foreign Legion. While trying to uncover the identity of a traitor in his own ranks, Indy battles hostile Berber tribesmen and engages in an innocent flirtation with author Edith Wharton.

First love - or first infatuation - overwhelms Indy in Vienna, where he is smitten with the daughter of Archduke Francis Ferdinand. Needing emotional guidance, Indy consults Sigmund Freud and Carl Jung to discover what love is all about. In Florence, when Indy's mother is equally smitten with Giacomo Puccini, composer of Romantic operas La Boheme and Tosca, Indy must guide his parent safely back to her spouse.

Going to college and working in a seedy speakeasy bring Indy into contact with jazz great Sidney Bechet, who teaches him how to play the blues. Unfortunately, he also crosses paths with up-and-coming thug Al Capone and it's only with the assistance of his dorm roommate, future Untouchable Eliot Ness, that Indy is able to solve a vicious murder and prevent himself from ending up in a pair of cement overshoes.

Receiving orders to assist the British in an attack on the ancient Middle Eastern desert town of Beersheba, Indy goes undercover with a beautiful lady spy. Relying on his wits and her tantalizing skill at belly dancing, the daring duo works desperately to defuse the explosives placed in the city's vital water wells by the occupying Turks. The story culminates in a spectacular cavalry charge by the gallant soldiers of the Australian Lighthorsemen Regiment, whose very survival hinges on the success of Indy's mission.

Indy finds that he must enlist the help of Hapsburg royalty when he embarks on a dangerous diplomatic mission through enemy-held Europe into the palace of Emperor Karl of Austria. Endangering his life and the lives of his royal charges, Indy gambles all in a desperate attempt to bring the war more quickly to an end. Then, in chaos-ridden Russia, Indy finds his espionage work once again threatening lives when he infiltrates a group of young Bolsheviks and begins to empathize with their plight. As the country lurches toward revolution, Indy finds himself torn between loyalty to his friends and his military duty.

Indy finds that he must enlist the help of Hapsburg royalty when he embarks on a dangerous diplomatic mission through enemy-held Europe into the palace of Emperor Karl of Austria. Endangering his life and the lives of his royal charges, Indy gambles all in a desperate attempt to bring the war more quickly to an end. Then, in chaos-ridden Russia, Indy finds his espionage work once again threatening lives when he infiltrates a group of young Bolsheviks and begins to empathize with their plight. As the country lurches toward revolution, Indy finds himself torn between loyalty to his friends and his military duty.

While visiting Russia on his father’s lecture tour, Indy runs off on his own and meets Leo Tolstoy. Later, on a trip to Athens, Indy and his father are forced together by circumstance when they get into a bind in the monasteries of Meteora, where they share some memorable moments.

On safari at the Masai Mara game preserve in Kenya with Teddy Roosevelt, Indy becomes lost in the vast and dangerous wilderness. Later, in Paris, he explores the fine-art scene and the rather wilder cafe scenes of Montmartre with a young Norman Rockwell.

Ireland's bloody 1916 Easter Uprising, the suffragette movement in England, a Zeppelin raid, and a meeting with a rising young British cabinet member named Winston Churchill become vivid vignettes in Indy's life. So too do his brief but impassioned romances with the sister of a clandestine Irish rebel, and with an English suffragette for whom the vote comes before love.