Ten-year-old Arco lives in a far future. During his first flight in his rainbow suit, he loses control and falls into the past. Iris, a girl his age from 2075, comes to his rescue and tries by any means to help send him back to his own era.

1947. On a beach, Madeleine, a waitress in a hotel restaurant, mother of a little boy, meets François, a rich and cultivated student. The force of attraction that pushes them towards each other is commensurate with the secrecy that each carries. If we know what Madeleine wants to leave behind by following this young man, we discover over time, what François is desperately trying to flee by mixing Madeleine's fate with his.