1854, London. Two women and three men suddenly die, including the father of young Agnes, 20 years old. For the police, nothing is suspect. But the young girl, afflicted by these events and obsessed with the need to discover the truth, turns into an inspector and leads her own investigation amid the general incomprehension: why delve what seems obvious ? A mind-blowing and supernatural discovery awaits her at the end of this epopee filled with twists, a discovery that leads her to wonder if there is any ounce of rationality in this world...