In 1984, fifteen-year-old Celestine Tolland and her parents were part of a crew of explorers who set off into space. Months after their departure, a virus ravaged the crew of the Phaeacia, killing nearly everyone aboard. The few survivors finally returned to Earth after nearly two years. However, because they were traveling near the speed of light-causing an effect known as time dilation-more than thirty years have passed on Earth. Celestine, who...