The 1889 World Exhibition in Paris could have turned into a nightmare. People were dying one after another at the hands of an elusive killer - and at the same time a strange epidemic broke out in the capital, claiming more and more lives... The police were powerless, and so were the doctors. Who managed to prevent the catastrophe? A group of intellectuals, each of whom had perfect knowledge of some information important for the investigation. The group included: Louis Pasteur - a brilliant scientist, the founder of microbiology. Jules Verne - a science fiction writer obsessed with the new possibilities of science. Oscar Wilde is a smart cynic, capable of causing any person to be frank. And at the head was Miss Nellie Bly, the first famous journalist of the 19th century, who more than once proved in her articles that she has the talent of a born amateur detective...