When flight Air France 006 enters a terrifying storm, the plane - inexplicably - duplicates. For every passenger on board, there are now two. Just one thing sets them apart. One plane leaves the storm in March. The other doesn't land until June. For world leaders, the emergence of the June flight raises serious alarms. But what happens to the passengers, now that their life is shared? Winner of the 2020 Prix Goncourt.