The young, somewhat simple-minded Cécile has been appearing in Maigret's office for weeks now with unwavering tenacity, claiming that a burglar has broken into her Aunt Juliette's apartment at night. Maigret and his assistants do not believe the allegations. A fatal mistake by the criminologists, as Cécile and her aunt are killed in shortly after each other. Maigret targets Gerard, Cécile's brother. Based on the 22nd Maigret novel Cécile est morte (1941), published in 45 continuations in the daily newspaper Paris-Soir between 18.02.1941 and 05.04.1941. German translation titles are Maigret hat Geduld and Maigret verliert eine Verehrerin.