Arco, a boy from the distant future, grows up high above the clouds in a world where people can fly and time travel is possible. On his first secret flight in a dazzling rainbow cloak, he loses control and crashes into the past—straight into the world of ten-year-old Iris from the year 2075, who lives on an Earth ravaged by environmental disasters. With ingenuity, courage, and the help of her loyal household robot, Iris tries to bring Arco back to his own time. Together, the two embark on a fantastic adventure between the present and the future, encountering unexpected challenges, bizarre situations, and magical moments—carried by friendship, trust, boundless childlike imagination, and the desire to return home.