With the help of journalist Diane Castelain, Parisian police inspectors Leo Gorce and Gu Arenas are trying to solve the murder of a member of the French Parliament, but some dangerous powerful people try to make sure that doesn't happen.

When Francois, a journalist, tours a big store for an article, he is chosen by the son of the newspaper's owner, Rambal-Cochet, as his new toy. Needing money and unwilling to quit his job, Francois agrees to this ridiculous assignment. Gradually befriending the spoiled boy, he induces him to play at making a newspaper, unveiling publicly the tyrannical way of life of the father. The powerful emotional climax we experience with the child astonishes both men.

Jeanne lives in Paris and believes she is the reincarnation of Don Juan. She visits a priest and tells him she has killed a man. He comes to her elegant flat - her father has died leaving her rich - and she tells the priest stories about men she has seduced. The seduction is easy, she tells him, it's destruction that takes planning. We watch her with an upright elected official, a wealthy boor, and a folk singer. She describes herself as a spider. Her friend Léporella tries to be Jeanne's conscience. What does Jeanne want?

Graf Yoster gibt sich die Ehre [French title: Le comte Yoster a bien l'honneur] is a TV series which followed the adventures of the title’s amateur gentleman detective. It was a success in particular in Germany and in France. Originally the show was a German production in black-and-white but it evolved into a European co-production in colour.