One night, 16-year-old Faustine follows a man dressed in Second Empire fashion to the Metro stop Cité and like Alice in Wonderland, she falls, falls, falls... only to wake up in the nineteenth century. She soon discovers she is part of a program whose goal is to locate someone whose abilities can change history. Soon, without even really knowing it, Faustine gets the upper hand over all the other guinea pigs and uses the possibilities that the simulation offers her to create an avatar able to shape her own destiny and others' as well.