Tomorrow they'll be in Africa, where their father wished to move back ; so today, Mathis and Antoine go to Paris. A day to say goodbye, roam the town, understand homecoming and mainly learn to discover each other...
Alex, an 18-year-old astrophysics student, dreams of the cosmos and of working at NASA, far from earthly concerns. But his bubble bursts when his mother, suffering from breast cancer, is about to undergo surgery: an event that diverts him from his orbit, the time of a sleepless night where nothing happens as planned, and where Alex gets lost before deciding to land...
