After 5 years, 16-year-old Gaby Roberge, returned to Sainte-Victoire High School with a rebellious air and a dirty attitude. Gaby can't stop thinking about graduating and moving on to CÉGEP where she will meet more intelligent young people. Peggy Lamothe, the school principal, decided to take Gaby under her wing so she could take advantage of her last year in college. She forces Gaby to integrate with the young people in her life and be less aggressive and more social.

Gaby and Fred are preparing for the world swimming championships which will be held in Quebec City this year. Their love will be put to the test when a former love of Gaby's turns up at the championships. Gaby finds herself at a crucial point of her life where she has to choose whether to continue competing or follow another dream that she's cherished forever, but which seems impossible to everyone else—her dream to become an astronaut.