The investigation is at a standstill because Fauvel, the main suspect to whom the €150,000 belonged, managed to escape to Switzerland without Emilie being able to question him. Is this money really linked to drug trafficking? After a thunderous argument with her ex, Emilie picks up her son Theo for the Christmas holidays. Theo discovers that his mother hid the existence of his grandparents from him and does not understand why she left Les Clairies twelve years earlier. At 3,000 meters above sea level, developer Gregory Jourdan and his Russian partner Tatiana Levsky observe the sabotage of the construction site of their luxury real estate project. It is probably the young ecological activist Alexia Maldini who is responsible for the damage. The mayor of Les Clairies, Florence Clairevoix, is summoned by Jourdan to put an end to the actions of these troublemakers, otherwise he will withdraw from the project...