In a small provincial town, the boarding-house is run by Mathilde Belin, the overindulging and over-demanding mother of Paul. When she is told by her envious sister Charlotte that her son is having a secret affair with Catherine, a salesgirl, she becomes furious and starts doing everything in her power to separate the lovebirds.

Professor Charles Buisson, astronomer and Nobel Prize winner, has just discovered a nova. He informs the other observatories by telephone. Just as he thinks one of them is calling back, he finds himself on the line with a young woman threatening suicide at the Ruban Bleu cabaret, if her lover hasn't joined her by midnight. Intrigued, the professor decides to go and prevent the unfortunate woman from committing suicide. One of his students, who earns her living as an understudy in a knife act, helps him in his investigation, while the school principal and a policeman suspect him of being a prankster or even of selling drugs. For the scientist, it's an opportunity to discover a world of music-hall that he'd never known before: "I thought I knew the sky chart by heart, but there's one planet that was totally unknown to me: Earth. I'll be back!

Daniella, a fashion model, goes to Rome to replace a model who's been murdered. Once there, she meets two men, Count Castellani, whose clothes she'll model, and Karl Bauer, a reporter in the hotel room next to hers. Castellani gives Daniella the spotlight, which prompts jealousy from another model. Is he merely trying to seduce her? It's soon apparent that he has other plans as well: the line of clothes is a cover for smuggling and perhaps espionage. Daniella may be in danger - one model is dead already. Is Bauer to be her protector, or is he after something too? Is anyone who they seem?

Since the day their mother Aline remarried, Patrice and Eric, a joyful pair of twins, have been very happy. Indeed, François Chantour, their stepfather, is very kind and behaves like a big brother to them. Even if they are not very rich, the four of them live a cheerful life in their charming house. The trouble is that, in Lyon, the family on the boys'father's side are worried, especially the twins' grandmother, who fears Patrice and Eric are given a bad education. She therefore brings them to her big house in the hope of their improving their manners. A very unfortunate decision indeed.

After a novice nun learns of the sudden death of her parents, she leaves the convent to manage the family business and look after her teenage sister. Both of them fall prey to a womanizing mechanic with psychopathic tendencies.