Ενότητα 1
 14
Boulevard Circulaire, Monsieur Dupont, spindle trees
Ενότητα 2
 26
Dupont, little doctor, Until seven tonight
Ενότητα 3
 47
post office, bicyclist, electric bell
Ενότητα 4
 55
Monsieur Dupont, Boulevard Circulaire, Madame Smite
Ενότητα 5
 133
Marchât, Doctor Juard, Roy-Dauzet
Ενότητα 6
 147
Dupont, Suicide, seven-thirty
Ενότητα 7
 149
Money Orders, Rue Jonas, raincoat
Ενότητα 8
 200
Carpenters, big clock, telephone booths
Ενότητα 9
 237
Monsieur Wallas, Juard, bodyguard
Ενότητα 10
 244
Wallas, left lens, right lens
Ενότητα 11
 249
lodger, I'm the manager, tiny millimeters
The narrative spans the twenty-four-hour period following a series of eight murders in eight days, presumably the work of a terrorist group. After the ninth murder, the investigation is turned over to a police agent, who may in fact be the assassin.