This drama is adapted from DTT's best-selling novel "Time Machine". The story tells the sweet "adventure" of "cold academic bully" Ye Youning (played by Shi Boyu) and "sunflower girl" Xia Wenxi (played by Chen Haoyu) in parallel time and space. The two met with a probability of one in a billion, restarted their high school life, met their youthful playmates again, and relived their first love. This dialogue across time and space has added a layer of fantasy to the beautiful youth.