The French government is asking Gustave Eiffel to design something spectacular for the 1889 Paris World Fair, but he simply wants to design the subway—until he crosses paths with a mysterious woman from his past.
Not less than 3 men and 40 animals were found dead on the Breton beaches. The identity of the killer is an open secret: green algae. Inès Léraud is still a young journalist when, driven by an ecological conscience, she decides to go to Brittany to investigate this phenomenon. Through her encounters with whistleblowers, scientists, farmers and politicians, she elucidates, not without difficulty, half a century of silence: samples that disappear in laboratories, bodies buried before being autopsied, influence games, pressure... Will the truth win?
A visa problem forces Adrien back to Paris after 15 years in Senegal with his wife Aminata. Her cousin Sékou, now distanced from his Senegalese origins, takes in Adrien. As Adrien awaits his return, Sékou shows him France, sparking surprises.
