After a beautiful but alcoholic stripper reports overhearing a murder plot in the club where she works, she recants and is murdered shortly thereafter.
When a young woman in distress calls Maigret in the middle of the night begging for help, the detective's chivalry is rewarded with a false charge of attempted rape.
After the collapse of a children's sanatorium kills 62, Maigret unofficially investigates the theft of engineer's report which had correctly predicted the disaster.
When a provincial middle-aged retiree is found shot to death in his bedroom, his relationship with his irascible young maid comes under Maigret's scrutiny.