生死钟声电视剧全集In 2050, Earth has become a dry and desolate place. Fighter pilot Nova is forced to travel back in time to prevent a devastating environmental disaster, however an unforeseen side-effect of time travel makes Nova young again and she crash lands into 2025 as a twelve-year old. Nobody seems to take her and her mission seriously, except for Nas - a neglected teen who tries to keep this mysterious girl and her little flying robot ADD out of the hands of the secret service. Will Nova and Nas succeed in saving the future world?