In the vibrant and bustling world of Paris in the 1960s, a policeman named Nestor Patou falls hopelessly in love with Irma, a young and charming "girl of the night" who works on one of the city's most popular streets. Nestor, a man of principles and morality, finds himself torn between his duty and his desire. Despite his law enforcement job, his heart races each time he sees Irma, who, although she strives to stand firm in her life choices, also feels a special connection with him.
The situation complicates when Nestor attempts to protect Irma from danger and the hardships of her profession, leading to a series of misunderstandings and comedic entanglements. Assuming a secret identity to rescue Irma from the world of prostitution, Nestor becomes an unlikely pimp, but things don't go as planned, setting off a chain of craziness that disrupts both their lives.
With a clever script and a light tone, the plot unfolds through moments of love, comedy, and reflections on life and sacrifice. The chemistry between the protagonists is electrifying, and Billy Wilder's unique direction ensures that every twist in the story is both entertaining and moving. The film presents a mosaic of emotions and laughter while exploring the eternal quest for true love in a world entangled by social conventions.