Married couple Jock & Nora are visiting the town of Litan during Litan's Day, with its carnivalesque atmosphere. When Nora wakes that morning from dreaming the bizarre death of her husband, she sets out across town to find him and warn him. But as she does, she encounters stranger and stranger people and events erupting into a frenzy in front of her. Now, she and Jock must elude all of the impediments in their way of reaching safety on the outskirts of town.
The insane Doctor Enger is obsessed with his plan to build a hospital to cure blind children, and goes on a killing and kidnapping spree with the police in pursuit.
An Italian painter, Antonio Berti, pays a visit to Reims to his friend Robert Maurisson, a banker with political views on the town hall, who hides, under an affable air and an irreproachable dignity, a libertine and cynical temperament. Charged by the notable with the restoration of paintings exhibited in the cathedral, the artist calls on Cathy, a young girl from the choir, to serve as his model. The young girl will be found dead a few hours after their interview, near one of Robert's properties.
A mentally disturbed man named Jérémie is scouring the area in search of women he can strangle with his scarf, which is embroidered with an ibis.
