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.

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.