1895. Discovery of X-rays. Researchers and scholars are true martyrs, because they do not know how to protect themselves against radiation dermatitis. Professor Belcour has to have one hand amputated, his assistant Henri Vermont, aware of the danger, has the courage to break up with his fiancée. Withdrawn to the countryside, they eventually recover.
Four men in love with the same woman put on a music-hall show and travel the world in search of the beauty. They will find success and fortune, but their sentimental quest will be a failure.
When Monsieur Crauqual, the supervisor, is found hanging, all wonder why this rather rich person decided to kill himself. And when a pupil is found hanging too, François and his friends decide to investigate. They are certain there is a killer within the walls of Collège François 1er and determined to prevent him from going on running wild.
On his fiftieth birthday, Serge Charan, a large industrialist overloaded with activities, decides to leave everything to go on an adventure. In a train heading for the Côte d'Azur, he meets six young girls returning to their boarding school. Arrived at their destination, Serge Charan rents, under an assumed name, a villa with a view of the garden of the boarding school. His presence arouses questions and the interest of young girls who are sensitive to his charm. But one of them, Simone, falls completely in love and runs away from boarding school.
Rosalie has had enough of "family life", in other words of Georges, her weak husband, and of her cantankerous mother-in-law. One day she decides to hit the road, not knowing where she is going. Joséphine is fed up with... being fed up with life. One day she decides to say no to cancer and depression and she hits the road. Her goal is to join her daughter Carole with whom she has been at odds for ten years. Rosalie and Joséphine, the two confused women meet, journey together, help each other and little by little become inseparable friends.
