A little girl on her summer vacation at her grandparents' rides a bicycle with her friend, a cat named Philippe, to the neighboring forest, thus embarking on an unexpected adventure. On this adventure, she meets fabulous characters: Rusalia, Boygen, also called the Great Detour, DallE, none other than Salvador Dali --now transmogrified into a new existence on the planet Trafalmadore, and even Steve Howe, guitarist of the progressive rock band Yes, and also her neighbor, the dog Geppetto, who receives a mysterious resemblance to Howe. Juli, DallE, and Steve climb together into the Pleiades, on the planet of the ineffable--Corianthe (with its moon Astarhe), where they briefly learn about its forms of relief, about the Alexandrian Sea of Slightly Rosy Amethyst, about the Corianthians and their customs, about the connection between the inhabitants of the planet and children on Earth, and about picomers--the primary forms from which earthly desires are born. There, Juli makes a wish and finds out about the elephant ladder. Her adventure lasts a whole day--by chance, exactly the day of the summer solstice ...