For almost a month, aboard the largest ship in the French Oceanographic Fleet, 75 students will have a unique experience around the challenges of tomorrow's ocean. In the form of a logbook, this documentary recounts the first campaign of the "École Bleu Outre-mer" by following the chronology of this expedition in the Indian Ocean in the summer of 2022. The legendary Marion Dufresne has been transformed for the occasion into a new kind of training ship. Scientists, budding artists and future sailors, these young people from mainland France and the Indian Ocean basin are experiencing an oceanographic campaign from the inside, alongside the researchers and crew of the Marion Dufresne. Passion for science, vocations, exchanges, learning and curiosity are on the program of this extraordinary human adventure.