Paris, the capital of Europe and center of world culture. People have gathered to celebrate the 1889 World's Fair, a spectacular extravaganza dedicated to new industries, scientific discoveries, and global exploration. Its gateway is the soaring Eiffel Tower. But an enigmatic killer stalks the streets, and a virulent plague is striking down Parisians by the thousands.

The world's most famous reporter - the intrepid Nellie Bly - is convinced that the killings are connected to the epidemic. Hot off another sensational expose, she travels to Paris to hunt down the mysterious man she calls "the Alchemist." Along the way she enlists the help of a band of colorful characters: science fiction genius Jules Verne, notorious wit and outrageous rogue Oscar Wilde, and the greatest microbe-hunter in history, Louis Pasteur.

This dazzling historical adventure pits Nellie and her friends against one of the most notorious murderers in history. Together they must solve the crime of the century.