The revelations extracted from Loïc threw the Montrex action into the abyss. Loane, upset that "his" Loïc lied to him, leaves him. Loïc has only one idea in mind: to recover the share of the winnings left to his father to rebuild his life and win back Loane.

Loïc succeeds in uniting the Montrex opponents thanks to Joseph's talents as a hypnotist. Alas, he forgets to join Loane at their meeting anniversary party. Then, barely elected head of the board of directors of Montrex, he was trapped by a journalist and confessed to the embezzlement that took him to the top.

Now a Montrex shareholder, Loïc must convince the enfant terrible of the family, Emeline, to support him in his raid against the other shareholders. Loane meets Joseph, replacing Jean-Hubert at short notice in her lover's transformist knife throwing show.

Jean-Hubert's strategy comes up against a drastic clause: only members of the Montrex family can acquire a stake in the company! It is Loane who will be surprised to learn that the birthmark on her buttocks is a sign of her Montrex ancestry...

Loïc and Jean-Hubert want to take advantage of the wedding of Jean-Hubert's brother to start a rumor (make people believe that they are going to sell Givard to the Chinese) and, thus, bait and trap the Montrex family, but Tina, who overheard their conversation , blackmails his father-in-law and forces him to change his plans. She forces him to come to a charity tea party which Loane absolutely wants to attend.

The "Big Lottery Winners Weekend" is timely. For Loane, it's the perfect opportunity to find herself in love with Loïc. For Loïc, who needs to rebuild his life, it's a chance to pluck a pigeon ready to invest in a pension fund set up from scratch by Jean-Hubert. Meanwhile, Tina organizes a big party in the Beau-Rivage suite during which Maël's rabbit escapes.

While Jean-Hubert tries to convince him to buy Givart, Loïc is pursued by Vlad, who threatens to cut off his finger, and by Coutric, Loto advisor, who wants to prevent his unreasonable spending. Maël and Tina have difficulty making friends at the new school, and Loan offers her talents as a plumber to Beau-Rivage.

After winning more than 160 million francs in the lottery, Loïc, whose reputation as a loser is no longer true, takes his entire family to Geneva and undertakes, with the help of Jean-Hubert, a financial advisor in need of recognition, to conquer Montrex, the prestigious watch brand which fired his father after years of good and loyal service.