This series is an adaptation of the comic book series Prudence Petitpas created by Maurice Maréchal in 1957. Prudence Petitpas is a charming elderly woman, a former schoolteacher, passionate about knitting and gardening, and enjoys chatting with her cat Stanislas. But her favorite activity is investigating the mysteries of her small village, Moucheron. Assisted by a group of young detectives, Prudence proves herself worthy of the greatest heroines from detective novels.