One year, through millions of years of unremitting efforts, the people on Earth finally broke through the limitations of time and space and were able to travel between parallel worlds and the past. Human beings thought they had cracked the mystery of the universe, so they called this year the First Year of the Universe. In the year 2017 of the cosmic calendar, Qin Jing graduated and applied for a job in the Time and Space Management Department, which many young people aspire to nowadays. He joined the restoration team and became a proud worldline restoration specialist.