Louis Mennechain is a modest locksmith. So imagine his amazement when Professor Piétrefond approaches him and tells him he recognizes in him a descendant of the kings of France, more precisely of Louis XVII (the king who never reigned). According to him he is none other than the monarch's great grandson. Louis's life is soon turned upside down as he becomes the center of attention of a group of ardent royalists. Even a duchess "gives" him her love to make sure that he accepts his role as pretender to the throne...

Isabelle is a lawyer who has Flip, a private detective, convicted of speeding. But shortly after, a murder is committed of which Isabelle's best friend is suspected. To save her, Isabelle is forced, despite her reluctance, to ask Flip for help, who agrees to look for the culprit.

In Paris, three models are murdered, being one of them the mistress of the fashion designer Dominique Airelle. It is the young inspector who is in charge of the affair.

A series of vignettes, in which Noel-Noel appears as the moderator, lecturer, commentator and leading actor, that examine the bores and pests of everyday life much like Pete Smith and Robert Benchley had done for years in American short subjects. Among those are the Practical Joker who will do anything for a laugh; the Party Entertainer who never stops singing; the Talkative Neigbor who forgets the time; the noisy neighbors who dance the tango all night; and women drivers, people who telephone at meal time, the friend you never saw before and amatuer medical experts. Much use of trick photography, montages, puppets and animation along with some adult Gallic wit and gentle satire.

Political intrigue and psychological drama run parallel. The queen is in seclusion, veiling her face for the ten years since her husband's assassination, longing to join him in death. Stanislas, a poet whose pen name is Azrael, is a suicidal anarchist, his imagination haunted into hate by longing for this queen who's drawn apart. He enters her private quarters intent on killing her then himself, but they fall in love, in part because he looks like the king. Stanislas wants her to regain political power by appearing to the public, and she tries to convince him to find hope and escape. All the while, the queen's enemies plot to keep the lovers together but to thwart their plans.

Sherlock Coco, famous detective, tries to thwart the machiavellian plans of the trio of shock. Croquignol, Ribouldingue and Filochard must be extra vigilant, but the profit motive is too strong. As a corollary, the famous pink diamond is also of interest to their legendary enemy, Jo Papillon. But always inventive, they will work out multiple scams and tricks to reach their goals.