Olive spends much of her days in the elaborate dream world that she has created, escaping the tedium of her boarding school. It is her private space where no one can bother her. Until one day when an astronaut named Lenny appears, crashing into the water in his space capsule. Olive's surprise deepens when she realizes that Lenny exists in real life, and a desperate search is underway to locate him following a failed reentry. With the help of her new friend Charlie, Olive will have to sift through the clues quickly in order to find Lenny and save his life. And when the girls decide to spend Christmas at Olive's house, they find a key to the mysteries of her dream world in the most unexpected of places: right at home.