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 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.