Having an invisible roommate is as difficult as it seems: Because of Leander, Lucy has constant problems with her parents. Until they run out of patience and Lucy ends up in a foster care camp in Colorado. Just when Lucy already thinks that even Leander has left her to her fate, he appears and asks her for help: Together with her, he wants to penetrate the final secrets of the triple jump. And time is running out, because due to a failed attempt to become human, Leander is gradually turning into a ghost.