Journalist and socialite Alice Scott is on an ocean liner headed to Buenos Aires. She’ll join her husband, Walter, who oversees hydroelectric development in South America—a booming business in the Roaring Twenties. When a member of the ship’s crew gives Alice an urgent message before his mysterious death, her comfortable life is suddenly thrust in a new direction. She discovers her husband is involved in weapons research for the American government. Unknown to them, a Russian espionage ring has picked up their trail. When Walter dies in a tragic car wreck in the Andes Mountains, Alice slips into a dark depression. His body isn’t found, robbing her of closure as she begins packing to return to America. However, her young housekeeper shares a secret that emboldens her to undertake a daring search into the jungle. With the housekeeper and a surprising companion, Alice sets out to find the truth.