Imagine if rainbows were actually time travellers? 10-year-old Arco lives in the distant future. During his first flight in his rainbow suit, he goes off course, loses control, and lands in our near future. Iris, a little girl who’s the same age as Arco, sees him fall from the sky. She will do everything she possibly can to help him go back home.

Il ne reste plus aucun homme sur la planète Terre, seulement les robots d’entretien qu’ils avaient programmés. À la tombée de la nuit, Mikki, le robot de l’Opéra Garnier, projette tous les soirs sur la scène les images mystérieuses d’une danseuse.

The story unfolds around one particular question: what if rainbows were actually men and women from the future who had come to observe the past? Ten-year-old Arco lives in the distant future of 2932. During his first flight, dressed in his rainbow space suit, he goes off course and ends up in the past of 2075. Iris, a little girl his age, sees him fall from the sky. She takes him in and helps him to get back home in any way she can…