Inspector Sergil is a detective comedy. Sergil, inspector of the P.J., investigates three crimes, helped by two pretty women, Bijou and Nadège.

During a crossing, Professor Rabas, a famous tamer, meets a certain Raymonde whom he brings back with him to his circus. The presence of the young woman leads to disagreement between Rabas and his younger brother, Léo; she suggests to the latter to enter the cage of the untamed lions, where he is injured. Rabas and Leo understood the lesson; Raymonde is hunted like an evil beast, and calm returns to the circus.

The Marquis Rodolphe de Sombrueil accidentally runs over a working man with his carriage and helps his widow -- unjustly accused of robbery -- to find her missing daughter.

The lover of an Italian revolutionary offers herself to Napoleon in exchange for her sweetheart's life.

The action takes place under the Restoration, at the Château de Savigny, near Nerville, a devout and prudish little town in the Cotentin region. Doctor Torty is the doctor. He tells a story of which he is the only one to know the secret, that of a criminal couple, without any remorse. The pretty Hauteclaire Stassin, daughter of the master of arms, meets the Count of Savigny, married to the noble and languid Delphine. Madly in love with the count, Hauteclaire joined the castle as a servant. Shortly after, the countess died of poisoning. Will the guilty lovers go unpunished?

In 16th-century France, the Chevalier de Pardaillan rescues the beautiful gypsy "Violetta", in reality Isabelle, daughter of the Comte d'Entraigues and prey of his sworn enemy, the Duke Henri de Guise. Pardaillan and Isabelle fall in love, and the valiant chevalier will not rest until the advent of King Henri IV.

Charles le Temeraire asks in marriage Jeanne de Beauvais, daughter of King Louis XI, wishing to get her valuable lands in dowry. The King is wise to this, and since his daughter does not feel inclined to accept, he refuses. Charles sets up a plan to abduct the prince, in a way that the suspicions will fall upon Robert de Neuville, a noble enamoured of the princess. Robert manages to free her from the castle where she was being kept. Charles keeps setting traps, and managing people to perjure against Jeanne, and the King himself. Finally, Jeanne escapes alive from a pack of wolves, who set watching the lady alone in the snow covered woods, instead of attacking her. Charles does yet accuse her of being a witch - wishing to have her dead rather than being the wife of Robert... Robert will be her champion in a Judgement of God. Will the 'miracle of the wolfs' repeat itself, or fearless Charles defeat Robert in the sword duel?