When Josephine arrives at the Salpêtrière asylum, she is diagnosed with what the Paris papers are calling “the epidemic of the age”: hysteria, a disease is so baffling and widespread that Doctor Jean-Martin Charcot, the asylum’s famous director, devotes many of his popular public lectures to the malady. Charcot often uses hypnosis to prompt his patients to reproduce their hysterical symptoms, and to his delight, Josephine proves extraordinarily susceptible. Laure, a ward attendant assigned to care for Charcot’s new favorite, knows that Josephine’s diagnosis is a godsend. Life in the Salpêtrière’s Hysteria ward is far easier than in its dreaded Lunacy division. But as Josephine’s fame grows, her memory starts to return—and with it, images of a terrible crime she’s convinced she’s committed. Haunted by these visions, and ensnared in Charcot’s hypnotic web, she starts spiraling into seeming insanity.