Paris, 1830. Valentin loses himself in alcohol, gambling and women. He does not believe in life and especially not in love. His uncle Van Buck believes only in the virtues of money and trade. Everything separates them until the day when Van Buck, to improve his public image, wants to make Valentin marry the young and impoverished Baroness Cécile. Valentin, who has absolutely no desire to get married, bets that he can easily seduce her in 24 hours and thus prove that she, like all the others, is not worth loving... But Cécile, who believes in true love, will prove much more difficult to woo than envisaged and Valentin will have to use all possible stratagems to try and win his bet. The game of cat and mouse starts... But who is the cat?

A bygone symbol of the luxury of yesteryear and a true institution in a provincial town, the "Grand Magasin" is living its last hours. Indeed, the management, which can no longer afford the establishment, is preparing to sell the store to a large distribution group. Agathe, a saleswoman in the men's department for more than 25 years, is shocked to discover that all the staff will be laid off. Feeling both betrayed and responsible for the future of the "Grand Magasin", she becomes a passionaria, leading her colleagues to revolt, a true leader. The operation finally seems to bear fruit when the sale is cancelled and a new director is appointed.

Léa is a strong person, but when she comes out of prison, she decides to get a fresh start. She would like to forget her cold and aloof father Vittorio Pastore, her young and irresponsible brother Samy for who she went in jail and the Zach's gang, the thug she used to love. But nothing elapses as she expected.

An accountant, presumed honest, inadvertently finds 7 million francs in his bag and decides to change his life.

Julie Toronto, a 32-year-old dwarf, quit her accounting job in Paris, to be with Antoine Delisles, the man of her life. She started working as a nanny at Antoine's. Julie is delighted: Antoine asked if he could marry her and both of his children love her. However, Antoine who is a lawyer, aspires to be President of the Bar. He understands pretty soon that the job he wants to fill is not necessarily compatible with the love he feels towards Julie Toronto.

Following a bet with his friends, Antoine steals a jacket. The life of his parents will be turned upside down.

The Cordier fight in family against the crime: the father is police captain, the son, investigating judge and the girl, a journalist.

A lawyer finds a special nanny who teaches his children all about prejudice and love.

Michel Sénéchal gave up fishing to please his wife Yvonne. Gone are the trawlers and the waters of Newfoundland. Hello to the Duclair ferry, of which he is commander. One evening, while he is cheating his boredom with a bottle of rum in the streets of the city, he is challenged by the advertisement of a traveling circus that invites you to discover "the mermaid Elsa, the one, the only, the true.